Chapter 3, Problem 63b
Several brands of antacids use Al1OH23 to react with stomach acid, which contains primarily HCl: Al1OH231s2 + HCl1aq2¡AlCl31aq2 + H2O1l2 (b) Calculate the number of grams of HCl that can react with 0.500 g of Al1OH23.
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Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium silicate 1Na2SiO32, for example, reacts as follows: Na2SiO31s2 + 8 HF1aq2¡ H2SiF61aq2 + 2 NaF1aq2 + 3 H2O1l2 (b) How many grams of NaF form when 0.500 mol of HF reacts with excess Na2SiO3?
The reaction between potassium superoxide, KO2, and CO2, 4 KO2 + 2 CO2¡2K2CO3 + 3 O2 is used as a source of O2 and absorber of CO2 in selfcontained breathing equipment used by rescue workers. (a) How many moles of O2 are produced when 0.400 mol of KO2 reacts in this fashion?
The reaction between potassium superoxide, KO2, and CO2, 4 KO2 + 2 CO2¡2K2CO3 + 3 O2 is used as a source of O2 and absorber of CO2 in selfcontained breathing equipment used by rescue workers. (b) How many grams of KO2 are needed to form 7.50 g of O2?
An iron ore sample contains Fe2O3 together with other substances. Reaction of the ore with CO produces iron metal: Fe2O31s2 + CO1g2¡Fe1s2 + CO21g2 (b) Calculate the number of grams of CO that can react with 0.350 kg of Fe2O3.
Aluminum sulfide reacts with water to form aluminum hydroxide and hydrogen sulfide. (a) Write the balanced chemical equation for this reaction. (b) How many grams of aluminum hydroxide are obtained from 14.2 g of aluminum sulfide?
Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas. (a) Write a balanced chemical equation for the reaction.