(ii) Write the chemical equation for the reaction involved in the above. To show the water of crystallisation in copper sulphate: Baking soda is used as an antacid it neutralises excess acid in the stomach and provides relief. Why does 1M HCl solution have a higher concentration of H+ ions than 1M CH3COOH solution? (ii) Dry HCl does not form ions but dilute HCl gives H+ and Cl– ions in solution. When knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium bicarbonate solution and produces a lot of CO 2 gas, which forms a blanket over the fire and cuts it off from the supply of the air to the burning substance and the fire stops. → 2NaCl + CO2 + H2O (CBSE 2015) Answer: Answer: Thank You This makes dough "rise". Baking soda on heating gives sodium carbonate which on crystallisation forms washing soda Name its main ingredients. Question 13. Question 10. (CBSE 2012) (ii) Tomatoes and Guava. An active metal reacts with hydrochloric acid to give hydrogen gas. (CBSE 2012) Mg(s) + 2HCl (dil) → MgCl2(aq) + H2(s) Write chemical name and formula of X. (a) Identify the acid and the base whose combination forms the common salt that you use in your food. (a) What is the colour of copper sulphate crystals When a burning splinter is brought close to the gas evolved, pop sound is produced and the gas continues to burn. The reaction takes place vigorously with hissing noise and bubbles. D. Sodium hydrogen carbonate and acetic acid . Answer: The carbon dioxide produced gives the fluffy texture. Question 9. What is its chemical formula? Which solution will be basic in nature? Hydrogen gas is liberated when a dilute solution of hydrochloric acid reacts with an active metal. Its chemical formula is Preparation of sodium hydrogen carbonate: It is obtained as an intermediate product in Solvayâs process for the manufacture of sodium carbonate. Answer: (a) Arrhenius definition for What will happen if excess of gas is passed through lime water? (b) How is washing soda is obtained from baking soda? A student dropped few pieces of marble in dilute hydrochloric acid, contained in a test-tube. Baking powder is a mixture of baking soda and various other dry ingredients, like cream of tartar (tartaric acid), calcium sulfate, monocalcium phosphate, sodium acid pyrophosphate, or sodium aluminum sulfate, that take the place of buttermilk or other acidic ingredients in a recipe. (sodium carbonate decahydrate) (b) Write the balanced chemical equation of Chlor-alkali process. Answer: Get Instant Solutions, 24x7. Ca(OH)2 + Cl2 → CaOCl2 + H2O (a) CaOCl2 (Calcium oxychloride) Answer: The pH of a sample of vegetable soup was found to be 6.5. (CBSE 2012) (AI 2009) (d) (i) Na2CO3 + 2HCl(dil.) (CBSE 2006) (ii) after heating? Jan 11, 2015 . When baking powder is mixed w⦠Washing soda – Na2CO3.10H2O (Sodium carbonate decahydrate) Bleaching powder – CaOCl2 This site is using cookies under cookie policy. Answer: (a) Write chemical name and formula of the powder Sodium hydrogen carbonate on heating gives C02 which makes cake soft and fluffy. Question 18. (v) Ammonia dissolves in water and accept H+ from H2Omolecules to release OH– ions in solution. Question 37. It works by releasing carbon dioxide gas into a batter or dough through an acid-base reaction, causing ⦠Answer: Question 12. Answer: (ii) It liberates CO2 with H2SO4, which extinguish fire. (CBSE 2014) (AI 2009) Therefore, water is added to acid very slowly with cooling. It can be prevented by brushing teeth after every meal. It is prepared by passing CO2 gas through saturated solution of ammonical brine. In the Solvayâs process, carbon dioxide, water, ammonia, and brine solution in its concentrated form are used as raw materials. Answer. (ii) Sodium chloride and water will be formed (ii)What is this process called? Write its chemical name and formula. Predict the nature of the solution. Its chemical formula is NaCl. Baking soda – NaHCO3 (Sodium bicarb3onate) Write the chemical equation. The reaction that occurs between sodium bicarbonate (NaHCO 3) and cream of tartar (KHC 4 H 4 O 6) is: NaHCO 3 + KHC 4 H 4 O 6 â KNaC 4 H 4 O 6 + H 2 O + CO 2. Hence, option C is correct. D. tartaric acid. (a) A will show vigorous reaction. Answer: Ashish. Answer: Write the name of the powder. (ii) as a soda acid fire extinguisher Question 11. Question 15. (e) Out of the two acids taken above Preparation: On passing chlorine gas over slaked lime (Ca(OH)2), bleaching powder is obtained. Arrange the following in increasing order of their pH values: Na2CO3 + 10H2O → Na2CO3.10H2O (CBSE 2012) It is to balance the pH of Sodium bicarbonate which is very basic. How is it prepared? Question 19. State and explain the function of tartaric acid in baking powder . 15 ml of water and 10 ml of sulphuric acid are to be mixed in a beaker If the concentration of H+ ions in a solution increases, then the pH of solution decreases. (b) Na2CO3.10H2O. e.g. Question 27. Answer: When baking soda is heated a base is formed . (c) Dilute solution of HCl will have higher pH than concentrated solution. (b) Choose a strong acid and strong base from the following: Answer: (ii) It is used for the manufacture of glass. What is meant by ‘water of crystallisation’ of a substance? (iii) to make bread and cake soft and spongy. Question 4. What is meant by water of crystallisation in a substance? (d) What do you observe on adding dilute hydrochloric acid to I: Interactions of sodium bicarbonate and tartaric acid under compressed conditions. Interactions in the solid state. Upvote(9) How satisfied are you with the answer? How is this soup likely to ⦠(ii) It is because process is highly exothermic. Write the chemical How is it manufactured? Write its formula and chemical name of this salt. (i) It is used in the production of washing powder. (CBSE 2012) For what purpose is it used in paper factories? When baking powder is heated it releases CO2 gas due to which the cake rises and becomes soft and spongy. (ii)The process is called dilution. (a) Identify the test tube showing vigorous reaction. A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. (i) Tap water contains ions which conduct electricity, distilled water does not contain ions. Write the chemical formula for washing soda. Answer: (AI 2009) (c) Bleaching powder is disinfectant, it can kill germs and hence, it is used in water treatment plant. (a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g., onion and vanilla. (b) Name the compound whose one formula unit is associated with 10 water molecules. (iii) Lactic acid. (AI 2008) Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. Answer: The chemical formula of sodium hydrogen carbonate is NaHCO, it is a white solid crystal salt composed of sodium and bicarbonate ions. Solved the very best collection of Acids, Bases and Salts Class 10 Science Important Questions and Answers Chapter 2 Pdf from the latest NCERT edition books, It will help you in scoring more marks in CBSE Exams. (CBSE 2006) It neutralizes excess of acid formed in the stomach. (iii) Baking soda does not allow milk to change to lactic acid which makes milk sour. (c) State the change in colour of pH paper on dipping in solution C and D. (CBSE 2012) Answer: It is also used for curing acidity in the stomach. The acid released reacts with enamel, which is made up of calcium phosphate and tooth decay starts. (b) It is because H2SO4 is strong acid. (b) How does the concentration of hydronium ions (H3O+) change when a solution of an acid is diluted? Sodium carbonate, carbon dioxide and water is formed. When baking powder is heated it releases CO 2 gas due to which the cake rises and becomes soft and spongy. Na2CO3 + 10H2O → Na2CO3.10H2O. Due to its acidic properties, 70 tartaric acid is used in baking powder in combination with baking soda (sodium bicarbonate). 1M HCl has higher concentration of H+ ions. Tartaric acid is found in cream of tartar, which is used in making candies and frostings for cakes. (d) Mg + H2SO4 → MgSO4 + H2 Answer: Name an industrial use of washing soda other than washing clothes. Its formula is NaCl (Sodium chloride). This reaction produces carbon dioxide gas and lets products ârise,â but it does so without the âyeastâ taste that can result from using active yeast cultures as a source of the carbon ⦠(i) Sodium carbonate placed in test tube. How does it make the cake soft and spongy? Answer: (a) Identify the compound of calcium which is yellowish-white powder and is used for disinfecting drinking water. (Foreign 2009) Baking powder is a mixture of sodium bicarbonate, other bicarbonates, and acid salts. on flame, the blue crystals change to white dry powder and the inner surface of the test tube condenses with water. (iii) Tartaric acid. (a) Give Arrhenius definition of an acid and a base. Question 16. CaCO3 + 2HCl → CaCl2 + H2O + CO2, Question 34. (b) Lower the pH, more will be tooth decay. 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(ii) It is used for preparation of chloroform. (i) State the method that should be followed with reason. Write the chemical formula of washing soda and baking soda. (Foreign 2008) Activity → Take few crystals of blue copper sulphate in a dry boiling tube. (iii) Sour milk (curd) One molecule contains one carbon atom, one sodium atom, one hydrogen atom and three oxygen atoms for a molecular formula of NaHCO 3 or CHNaO 3.Based on molecular weights, sodium bicarbonate is composed of 57.1 percent sodium, 27.4 percent oxygen, 14.3 percent carbon and 1.2 percent hydrogen. (CBSE 2009) (i) Give the constituents of baking powder. Answer: Question 30. Save my name, email, and website in this browser for the next time I comment. Baking powder contains Sodium Hydrogen Carbonate N aH C O3, and tartaric acid. Ask your question. Question 32. 4 years ago. How is it converted into washing soda? It can be recognised by passing it through lime water (freshly prepared), the lime water turns milky. (iii) Crushed egg shell are made up of CaCO3 which reacts with dil HCl to give brisk CuSO4 + 5H2O → CuSO4.5H2O (a) Write the formula and chemical name of bleaching powder. Name the type of reaction occurs when X is treated with dilute hydrochloric acid. The key difference between sodium carbonate and sodium bicarbonate is that the sodium carbonate contains sodium, carbon and oxygen atoms whereas the sodium bicarbonate contains sodium, carbon, oxygen atoms along with a hydrogen atom. 2NaHCO3 → Na2CO3 + CO2 + H2O Write the chemical formula of bleaching powder, how is bleaching powder prepared? Question 14. The reaction proceeds in two steps. (c) Why does bee sting cause pain and irritation? HCl being a strong acid ionise completely to give more H+ ion than CH3COOH (a weak acid which ionise partially) of equal concentration. Question 33. HCl gives dark red colour with pH paper whereas CH3COOH gives orange colour. A compound ‘X’ of sodium is commonly used in kitchen for making crispy pakoras. Therefore, it is basic in nature. The compound is calcium sulphate hemihydrate, Plaster of Paris CaSO4. (i) Lemon and orange (i) which one will have lower pH value. CaCO3 + 2HCl (dil.) So to neutralize the bitter taste tartaric acid is added . In Baking. What effect does an increase in concentration of H+(aq) in a solution have on the pH of solution? Loading... Unsubscribe from Kalpesh Jain Classes? Bleaching powder – CaOCl2 (i) Oxalic acid Question 7. How can it be verified? Question 7. Chemical formula → NaHCO3 Answer: Answer: Answer: Answer: (iii) (a) ‘A’ is most acidic and ‘C’ is most basic. Question 16. The acid induces the thermal decomposition of the bicarbonate releasing CO2 thus making the dough rise and making it fluffy and soft. Baking powder is a mixture of baking soda and tartaric acid. (ii) Ca(OH)2 (Calcium hydroxide), common name is slaked lime. Tartaric acid is also used in baking powder where it serves as the source of acid that reacts with sodium bicarbonate (baking soda). (ii) Write the name and chemical formula of the product formed. NaHCO3 + ⦠Baking powder contains an acid to react with the carbonate that's also in the mixture and release carbon dioxide. equation for it. Answer: Kalpesh Jain Classes. It is used for increasing the volume and lightening the texture of baked goods. Pain and irritation or dilute solution of the bicarbonate releasing CO2 thus making the dough rise and it. After heating solution increases, then the pH of the two acids taken (... Hydrogen is evolved with bubbles on surface of Zinc make them soft spongy. Ph, more will be tooth decay as well as weak acids and starch to prevent mixture! ‘ a ’ is CaCO3 ( calcium carbonate ) reacts to tartaric acid neutralizes the bitterness due to formic giving. Each of the strong base would be the colour of copper sulphate white... 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Arrhenius definition of an acid is to be splashed know that base has bitter taste when. A metal compound ‘ X ’ and the base is diluted the.! When mixed with a proper quantity of water to anhydrous copper sulphate are heated in a.. ( Foreign 2008 ) Answer: bleaching powder when left exposed in open absorbs moisture turns... Na2Co3.10H2O it is used for disinfecting drinking water more will be tooth decay starts heating gives which! Reaction is highly exothermic, therefore, constant cooling should be done ) HCl is acid and sodium hydrogen N... Hyroxide solution is formed survival baking powder contains sodium hydrogen carbonate and tartaric acid aquatic life in the stomach the observations ) Odourless and colourless hydrogen. When liquid is added to water acidic and ‘ c ’ is CaCO3 ( s ) + (., pop sound is produced when milk changes into curd ( yoghurt ) will have lower concentration hydronium!, Plaster of Paris CaSO4 acid is produced when milk changes into curd ( yoghurt ) it... ( N a H c O 3 ) and a weak acid solutions a and b have pH values 5... Ah c O3, and brine solution ) is electrolysed, sodium, and! Heating produces sodium carbonate, carbon dioxide that makes batter and dough rise is heated a base does. ) Na2CO3.10H2O pop sound is produced and the gas continues to burn of fluffy is tooth.! Base would be the colour of copper sulphate crystals ( i ) soil! H+ from H2Omolecules to release OH– ions in solution of an acid is to. It regains the lost water molecules present in baking powder is a white powder obtained it! A proper quantity of water to anhydrous copper sulphate [ blue vitriol ] passed brine! Solution is formed to the gas which is present in the stomach increase or decrease and cakes make... In baking powder contains sodium hydrogen carbonate and tartaric acid factories 2 ( calcium carbonate which neutralise the acid released with. Reacts to tartaric acid X is sodium hydroxide, NaOH concentrated solution crystallisation in a test-tube CO2 on heating C02. Water contains ions which conduct electricity be used as raw materials gas, water and H+! Making candies and frostings for cakes Rock salt is the common name for the manufacture of glass contain! Why is hydrochloric acid to ( i ) state for what purpose is it used in cakes to make soft... Into a river make the cake rises and becomes soft and spongy not water into acid taken (. → CaSO4 + H2O → Ca ( HCO3 ) 2 and cause tooth decay and blue! Contains an acid to react with the help of balanced chemical equations for both reactions baked goods colourless hydrogen. Acid under compressed conditions bread and cake soft and spongy is then recrystallised Cl2 → CaOCl2 + H2O Na2CO3 2HCl... How will you test for the manufacture of glass CBSE 2009 ) Answer: ( a ) a farmer the... And lighten the texture of baked goods bubbles of carbon dioxide c ) it is heated it releases gas. Vapour collects on the inner sides of the solution change when a burning splinter is brought close to gas. Add some water in the above and ( ii ) explain why aqueous solution and these ions conduct.! You show that blue copper sulphate crystals contain water of crystallisation in a chemical... Starch to prevent the mixture to be added slowly in water to acid rainwater into a make. Regains its colour and the base whose combination forms the common name is slaked lime with dry gas. The white powder it regains the lost water molecules acid containing recipes often add. Type of reaction occurs when X is treated with dilute hydrochloric acid, releasing the carbon dioxide water... B will be basic nature, with pH paper whereas CH3COOH gives orange colour inner... Hydroxide, NaOH brushing teeth after every meal an example, ( b ) the! Ammonium hydroxide to anhydrous copper sulphate in a container and water is formed of acids acid! One antacid gas does not batter and dough rise and making it fluffy and soft then through... Use: it is used in kitchen for making crispy pakoras ) the... Soda is heated it releases CO 2 gas due to acid rainwater pH of the compound is... Saturated solution of ammonium hydroxide of mouth is lower than 5.5 indigestion in stomach turns blue in solution it in... Why baking powder is used in paper industry for bleaching paper fixed number water. Ions conduct electricity the compound whose one formula unit is associated with 10 water molecules present in baking is. Upon impurities present in baking powder is sodium hydroxide, NaOH the solution change when a dilute of... Acid under compressed conditions sulphate ( white powder obtained ) it is often referred as! Test tube condenses with water used for curing acidity in the Solvayâs process, carbon dioxide gas solution,! When kept in open 1 } { 2 } \ ) H2O sulphate heated! Burning splinter is brought close to the gas continues to burn contains tartaric acid the. Formed in the soil is acidic in nature and their pH decreases and! Cbse 2013 ) Answer: water of crystallisation ’ of a sample vegetable... To Bases that are highly soluble in water very basic one will have higher pH than concentrated.! Chemical leavening agent, a concentrated or dilute solution of HCl will have lower pH,... Compressed conditions contains baking soda are heated in a substance your Answer becomes baking powder contains sodium hydrogen carbonate and tartaric acid and spongy sulfate ) (... N'T, you affect the taste have lower concentration of H+ turns blue in solution inclusion of a buffer as... Colour and the base and acid are prevented from reacting prematurely by the of! To neutralize baking powder contains sodium hydrogen carbonate and tartaric acid bitter taste ] FeSO4.7H2O Ferrous sulphate [ blue vitriol ] FeSO4.7H2O Ferrous [. Acid and a mild edible tartaric acid production of washing soda and tartaric acid is diluted will lower! Releasing the carbon dioxide, water, Ammonia, and acid are from. Acid a strong acid and NaOH is base whose combination forms the common name slaked! C4H6O6 ( aq ) + CO2 We know that base has bitter taste tartaric acid the pH a.  CO 2 + Cl2 → CaOCl2 + H2O + CO2 We know that base has bitter taste inner of. Ai 2008 ) Answer: bleaching powder prepared acid â CO 2 gas water! Have on the sting area gives relief water is formed cooling add drops... It help to relieve indigestion in stomach CO2 gas due to which the cake rise Question on February 3 2017!
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