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.
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Here are the solutions to your questions: 13. Below is a simplified scheme of solvay process. Study it and answer the questions that follow. 13a) Identify gas R. In the Solvay process, ammonia solution is reacted with carbon dioxide (Gas R) and brine to form ammonium bicarbonate, which then reacts further. Gas R: Carbon dioxide (CO_2) 13b) Write an equation for process III. Process III involves the thermal decomposition of sodium bicarbonate (NaHCO_3) to produce sodium carbonate (Na_2CO_3), water, and carbon dioxide. 2NaHCO_3(s) heat Na_2CO_3(s) + H_2O(g) + CO_2(g) 13c) Give one use of sodium carbonate. Sodium carbonate is a versatile industrial chemical. One use: Manufacture of glass (Other uses include making detergents, softening hard water, and in paper manufacturing). 14. The set-up below was used to investigate the properties of hydrogen. 14i) State two observations that were made in the combustion tube as the reaction progressed. In the combustion tube, hydrogen gas reacts with heated Lead(II) oxide (PbO). Hydrogen acts as a reducing agent, reducing the lead(II) oxide to lead metal and forming water. H_2(g) + PbO(s) heat Pb(s) + H_2O(g) 1. The yellow/orange solid (Lead(II) oxide) turned into a grey solid (Lead metal). 2. Colourless liquid droplets (water) were observed on the cooler parts of the combustion tube. Last free one today — make it count tomorrow, or type /upgrade for unlimited.