(CBSE 2012) Baking powder Baking powder contains sodium hydrogencarbonate and an acid or a mixture of acids. The gas evolved is CO2. (i) Tap water conducts electricity whereas distilled water does not. (v) Ammonia is a base but does not contain hydroxyl group. (CBSE 2015) Na2CO3 + 10H2O → Na2CO3.10H2O When baking powder is heated it releases CO 2 gas due to which the cake rises and becomes soft and spongy. (ii) It is used for the manufacture of glass. Red litmus turns blue in solution of ammonium hydroxide. Answer: To show the water of crystallisation in copper sulphate: in it. Question 5. Tartaric acid is also used in baking powder where it serves as the source of acid that reacts with sodium bicarbonate (baking soda). (d) Mg + H2SO4 → MgSO4 + H2 Predict the nature of the solution. (a) Identify the compound of calcium which is yellowish-white powder and is used for disinfecting drinking water. Answer: Question 30. The pH of a sample of vegetable soup was found to be 6.5. (e) ‘A’ (H2SO4) will have lower pH. What happens chemically when quick lime is added to water? (b) It is the water of crystallisation. It is also used for curing acidity in the stomach. (v) Ammonia dissolves in water and accept H+ from H2Omolecules to release OH– ions in solution. Answer: Baking powder is a mixture of baking soda and tartaric acid. The pH range suitable for aquatic survival is 7.0 to 7.8 and due to acid rainwater pH of river water decreases. Author has 551 answers and 523.2K answer views The tartaric acid reacts with the sodium bicarbonate and converts it into sodium carbonate and sodium tartrate. What is ‘Baking Powder’? (ii) A farmer treats the soil with quicklime or calcium carbonate. (b) Write the balanced chemical equation of Chlor-alkali process. (ii) It liberates CO2 with H2SO4, which extinguish fire. Answer: (d) (i) Na2CO3 + 2HCl(dil.) Log in. It is combined with cream of tartar(tartaric acid) to give baking powder which is used in doughs to make cakes, bread, etc. Sodium hydrogen carbonate is also known as sodium bicarbonate and baking soda. Write the chemical reaction taking place when the powder is heated during baking. If you don't, you affect the taste. Answer: Baking powder contains an acid to react with the carbonate that's also in the mixture and release carbon dioxide. Why does 1M HCl solution have a higher concentration of H+ ions than 1M CH3COOH solution? (CBSE 2014) 0 0. bravozulu. Question 7. (Foreign 2008) NaHCO3 + ⦠How is the pH of a solution of acid influenced when it is diluted? 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. It releases carbon dioxide gas into a batter or dough through an acid-base reaction, causes bubbles in the wet mixture which expands and thereby leavening the mixture. Two solutions A and B have pH values of 5 and 8 respectively. In purely chemical terms, baking soda consists of only one ingredient, namely sodium bicarbonate (whose IUPAC name is sodium hydrogen carbonate). answered. Answer: e.g., CUSO4.5H2O Copper sulphate [Blue vitriol] (i) When sodium hydrogen carbonate is heated. With the help of balanced chemical equations for all the changes explain the observations. Kalpesh Jain Classes. Thank You Zn(s) + 2HCl(dil) → ZnCl2(aq) + H2(g). (iii) Sour milk (curd) Sodium carbonate (Na2CO3), commonly called as washing soda or soda ash, is a sodium salt of carbonic acid whereas, sodium bicarbonate (NaHCO3), known as baking soda, is another salt of sodium. (iii) (a) ‘A’ is most acidic and ‘C’ is most basic. The water molecules associated with a crystalline substance is called ‘water of crystallisation’. (c) What happens when electricity is passed through brine? It is manufactured by reaction of solid slaked lime with dry chlorine gas. (CBSE 2008) (b) \(2 \mathrm{NaHCO}_{3} \stackrel{\text { heat }}{\longrightarrow} \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\) Answer: Its formula is NaCl (Sodium chloride). Baking soda (sodium hydrogen carbonate) reacts to tartaric acid and forms CO 2 gas, water and sodium salt of acid. The bicarbonate is the main leavening agent, I believe. Mg + H2CO3 → MgCO3 + H2 Quick lime reacts with water to form calcium hydroxide (slaked lime) and large amount of heat is released (exothermic reaction) with a hissing sound. Question 37. Baking soda is a mixture of sodium hydrogen carbonate (N a H C O 3 ) and a mild edible tartaric acid. (a) Write the formula and chemical name of bleaching powder. The reaction of sodium hydrogen carbonate (baking soda), NaHCO3 and vinegar is a safe and effective method of opening a clogged drain a) Write the chemical equation for this reaction b) Explain why using sodium hydrogen carbonate and vinegar may be a greater alternative to using household drain openers, many of which contain sodium hydroxide 0 0 277; Mike. B will be basic nature, with pH = 8. How does it provide relief in stomach ache? Write the chemical formula of washing soda and baking soda. Write the chemical formula of bleaching powder, how is bleaching powder prepared? (ii) Vinegar H2 and Cl2 gases are liberated. Bleaching powder – CaOCl2 (AI 2009) \(\frac{1}{2}\)H2O. (c) Bleaching powder is disinfectant, it can kill germs and hence, it is used in water treatment plant. Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? 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