Chapter 4: Q83E (page 224)
A sample of gallium bromide, GaBr2, weighing 0.165 g was dissolved in water and treated with silver nitrate, AgNO3, resulting in the precipitation of 0.299 g AgBr. Use these data to compute the %Ga (by mass) GaBr2.
The required % Ga = 22.4 %
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What volume of 0.0105-M HBr solution is required to titrate 125 mL of a 0.0100-MCa(OH)2 solution?
Ca(OH)2(aq) + 2HBr(aq)⟶CaBr2(aq) + 2H2 O(l)
Which is the limiting reactant when 5.00 g of H2 and 10 g of O2 react to form water?
Outline the steps needed to solve the following problem, then do the calculations. Ether,\({\left( {{C_2}{H_5}} \right)_2}O\), which was originally used as an anesthetic but has been replaced by safer and more effective medications, is prepared by the reaction of ethanol with sulfuric acid.\(2{C_2}{H_5}OH + {H_2}S{O_4} \to \left( {{C_2}{H_5}} \right)2O + {H_2}S{O_4} \cdot {H_2}O\)What is the percent yield of ether if 1.17 L (d = 0.7134 g/mL) is isolated from the reaction of 1.500 L of C2H5OH (d = 0.7894 g/mL)?
A 20.00ml sample of aqueous oxalic acid H2C2O4 was titrated with a 0.09113M solution of potassium permanganate KMnO4,
\(2MnO_4^ - \left( {aq} \right) + 5{H_2}{C_2}{O_4}\left( {aq} \right) + 6{H^ + } \to 10C{O_2}\left( g \right) + 2M{n^{2 + }}\left( {aq} \right) + 8{H_2}O\left( l \right)\)
A volume of 23.24 ml was required to reach the endpoint. What is the oxalic acid molarity?
Write a balanced equation describing each of the following chemical reactions.
(a) Solid potassium chlorate, KClO3 decomposes to form solid potassium chloride and diatomic oxygen gas
(b) Solid aluminium metal reacts with solid diatomic iodine to form solid Al2I6
(c) When solid sodium chloride is added to aqueous sulfuric acid, hydrogen chloride gas and aqueous sodium sulfate are produced.
(d) Aqueous solutions of phosphoric acid and potassium hydroxide react to produce aqueous potassium dihydrogen phosphate and liquid water.
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