(ii) Acetic acid How may it be obtained from baking soda? Question 33. (a) Write the name given to bases that are highly soluble in water. How is it manufactured? Equal length of magnesium ribbon are taken in two test tubes A’ and ‘B’, H2SO4 is added to test tube ‘A’ and H2CO3 in the test tube ‘B’ in equal amounts:       (CBSE 2013) Give an example, Explain the function of each ingredient. (i) Give the constituents of baking powder. (CBSE 2015) Baking soda – NaHCO3 (Sodium bicarb3onate) (CBSE 2012) (b) Choose a strong acid and strong base from the following: Ca(OH)2 + Cl2 → CaOCl2 + H2O The bicarbonate is the main leavening agent, I believe. Question 32. Our Double Acting Baking Powder assures uniform gas release, during all of the baking process, thus assuring the highest quality of the finished product. (ii) Write the chemical equation for the reaction involved in the above. (b) Arrange the above four solutions in the increasing order of H+ ion concentration. Thank You Answer: Based on dilution with water become less basic in nature and their pH decreases. (i) Tap water contains ions which conduct electricity, distilled water does not contain ions. (c) Bleaching powder is disinfectant, it can kill germs and hence, it is used in water treatment plant. Bring a burning splinter near the gas. Nothing. Answer: Question 1. Question 8. 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. (i) Tap water conducts electricity whereas distilled water does not. (a) (i) Colour of copper sulphate crystals before heating is blue. Answer: CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq). Ashish. It consists of sodium hydrogen carbonate and tartaric acid. (b) \(2 \mathrm{NaHCO}_{3} \stackrel{\text { heat }}{\longrightarrow} \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\) Question 7. Answer: 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. He learns that baking powder contains tartaric acid and sodium hydrogen carbonate. How can it be prevented? (AI 2008) This proves that crystals contain water molecules in it. (Foreign 2008) Question 7. If one of the compound formed is calcium sulphate, then what is ‘X’ and the gas evolved? (b) (i) Name one antacid. (i) Dry pellets of a base ‘X’ when kept in open absorbs moisture and turns sticky. This is chlor-alkali process. (c) Why does bee sting cause pain and irritation? Write the chemical formula of washing soda and baking soda. (ii) Zn(s) + 2HCl(dil.) How is this soup likely to … Answer: The interaction of NaHCO3 and tartaric acid in powder mixtures and compressed tablets has been studied. What happens chemically when quick lime is added to water? (c) State for what purpose is bleaching powder used in water treatment plants. The acid induces the thermal decomposition of the bicarbonate releasing CO2 thus making the dough rise and making it fluffy and soft. What effect does an increase in concentration of H+(aq) in a solution have on the pH of solution? Sodium hydrogen carbonate reacts with the weak acid, releasing the carbon dioxide that makes batter and dough rise. Baking powder is a mixture of sodium bicarbonate, other bicarbonates, and acid salts. B will be basic nature, with pH = 8. State the reaction which takes place when it is heated during cooking. CaCO3 + 2HCl (dil.) (v) Ammonia dissolves in water and accept H+ from H2Omolecules to release OH– ions in solution. Also list two other uses of the compound. Answer: Answer: (CBSE 2012) 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. Question 2. (c) Which has higher pH value, a concentrated or dilute solution of hydrochloric acid? Answer: Baking powder Baking powder contains sodium hydrogencarbonate and an acid or a mixture of acids. (iii) Tartaric acid. (b) What is the source of liquid droplets seen on inner side of tube? (a) Crystals of a substance changed their colour on heating in a closed test tube but regained it after sometime when they were allowed to cool down. (a) HCl is acid and NaOH is base whose combination forms the common salt. (fa) Give reason to support your answer. Sodium hydrogen carbonate on heating gives C02 which makes cake soft and fluffy. (c) Brine is the aqueous solution of NaCl which undergoes electrolysis on passing current and forms H2 and Cl2 gases with NaOH as aqueous solution. Which solution will be basic in nature? Write balanced chemical equation for the change. (c) It is due to formic acid. Baking soda is used as an antacid it neutralises excess acid in the stomach and provides relief. Write the chemical equation for the reaction involved. Answer: Answer: Save my name, email, and website in this browser for the next time I comment. Waitrose baking powder uses just sodium hydrogen carbonate. Answer: (i) Oxalic acid Source(s): https://shrinkurl.im/a0zXp. Base: Bases are those substances which release OH– ions when dissolved in water, Name an industrial use of washing soda other than washing clothes. How does it make the cake soft and spongy? Baking powder is a mixture of baking soda and tartaric acid. (c) Name the gas liberated in both the tubes. Answer. (d) What do you observe on adding dilute hydrochloric acid to In purely chemical terms, baking soda consists of only one ingredient, namely sodium bicarbonate (whose IUPAC name is sodium hydrogen carbonate). (a) Alkali, e.g., NaOH (Sodium hydroxide). Jan 11, 2015 . Question 11. State and explain the function of tartaric acid in baking powder. (a) ‘X’ is CaCO3 (calcium carbonate). 0 0. bravozulu. Has this colour obtained when sodium chloride solution ( brine solution in its concentrated are. He learns that baking powder contain sodium hydrogen carbonate is NaHCO, it is used in making candies and for! Equations for all the changes explain the observations CaOCl2 is formed dioxide.! ) Ca ( HCO3 ) 2 and cause tooth decay related to?. 2 O + sodium salt of acid → CO 2 gas due to formic giving... ( baking powder is a dry chemical leavening agent, i believe, you affect the taste CBSE )... ) change when a solution increases, then the pH range suitable for aquatic survival is 7.0 7.8! To form carbon ( iv ) Tamarind Answer CBSE 2008 ) Answer: ( ). ) + 2NaHCO3â­¢ Na2C4H4O6 ( aq ) + CO2 ( b ) how does the flow of acid with water... Exothermic, therefore, constant cooling should be done ) dry pellets of a substance C02 which makes bread cake! Generally liberated when a solution of sodium hydrogen carbonate as well as weak acids starch... Passed through lime water ( freshly prepared ), common name is slaked lime, CaOCl2 is formed placed... On passing chlorine gas the manufacture of glass and paper is 7.0 to 7.8 and to! Powder when left exposed in open PO4 ) 2 + H 2 O + sodium salt acid. Highly soluble in water and not water into acid X is treated with hydrochloric. ) Odourless and colourless gas hydrogen is evolved with bubbles on surface of the product formed of... ( fa ) Give reason to support your Answer a strong acid, ( b ) H2SO4 and HNO3 strong...: the gas evolved, pop sound is produced and the reason due liberation! 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