This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Another one bazuunelson — let's solve it. a) i) The loss in mass was due to the escape of carbon dioxide gas (CO_2) produced during the reaction. CaCO_3(s) + 2HCl(aq) CaCl_2(aq) + H_2O(l) + CO_2(g) ii) The average rate of reaction was faster between 0 and 2 minutes because the concentration of hydrochloric acid was higher at the beginning of the reaction. As the reaction proceeds, the concentration of reactants decreases, leading to a slower reaction rate. iii) One way to increase the rate of reaction is to increase the temperature of the reaction mixture. Other ways include increasing the concentration of hydrochloric acid or increasing the surface area of the marble chips. iv) The white precipitate formed when aqueous sodium sulphate was added is calcium sulphate (CaSO_4). CaCl_2(aq) + Na_2SO_4(aq) CaSO_4(s) + 2NaCl(aq) v) One use of calcium sulphate is in the production of Plaster of Paris (for casts, sculptures, or wallboard). What's next?