4.7 End of Chapter 4: Chemical Reactions Stoichiometry

If 70.9 g of chlorine reacts with sufficient cesium to produce cesium chloride, what is the theoretical yield?

2 Cs  +  Cl₂   à   2 CsCl

How many grams of the excess reagent will be left over after the reaction

Ca(OH)₂(s) + 2 HCl(aq) …>  CaCl₂(aq) + 2 H₂O(l)

If I combined 15.0 grams of calcium hydroxide with 75.0 mL of 0.500 M

HCl, how many grams of calcium chloride would be formed?

In the reaction CaCO₃ + 2HNO₃  -> Ca(NO₃)₂ + CO₂ + H₂O, how many milliliters of 0.1015 M HNO₃ are required to react with 0.9857 grams of CaCO₃?

In an experiment, an average of 67.0 ml of 0.468 mol/L magnesium hydroxide (Mg(OH)₂ ) is required to titrate 50.0 ml of the acid in order to reach the endpoint. The neutralization reaction is:

2CH₃COOH (aq) + Mg(OH)₂ (aq) -> Mg(CH₃COO)₂ (aq) + 2H₂O (l)

The concentration of acetic acid (CH₃COOH) is

Which statement concerning titrations is incorrect?

The end point of a titration is defined as

To obtain a precipitate that is useful for gravimetric analysis, the analyst tries to obtain conditions to encourage crystal growth, as opposed to the formation of a colloid. Which of the following statements aids in the formation of a crystalline precipitate?

A sample containing 0.2784 grams of sodium chloride (NaCl) and 0.5486 grams of magnesium chloride (MgCl₂). The chloride in the sample was precipitated by the addition of 47.8 mL of a silver nitrate solution. What is the concentration of the silver nitrate solution?

A sample of ore containing manganese weighed 1.2354 grams. This sample was heated in a solution of nitric acid, which dissolved the manganese producing manganese(III) nitrate [Mn(NO₃)₃]. The acidity of the solution was adjusted, and hydrogen sulfide gas was bubbled into the solution producing 0.2876 grams of manganese(III) sulfide [Mn₂S₃]. What is the percentage of manganese in the original sample?

In the combustion of phthalic acid [C₆H₄(COOH)₂], how many moles of water are produced per mole of phthalic acid burned?

In gravimetric analysis,

After combustion with excess oxygen, a 12.501 g of a petroleum compound produced 38.196 g of carbon dioxide and 18.752 of water. A previous analysis determined that the compound does not contain oxygen. What is the empirical formula of the compound?

In the course of the combustion analysis of an unknown compound containing only carbon, hydrogen H₂, and nitrogen N₂, 12.923 g of carbon dioxide CO₂ and 6.608 g of water were measured. Treatment of the nitrogen with H₂ gas resulted in 2.501 g NH₃. The complete combustion of 11.014 g of the compound needed 10.573 g of oxygen. What the compound’s empirical formula?

12.915 g of a biochemical substance containing only carbon C, hydrogen H₂, and oxygen O₂ was burned in an atmosphere of excess oxygen. Subsequent analysis of the gaseous result yielded 18.942 g carbon dioxide and 7.749 g of water. What is the empirical formula of the substance?

33.658 g of oxygen O₂ was used to completely react with a sample of a hydrocarbon in a combustion reaction. The reaction products were 33.057 g of carbon dioxide and 10.816 g of water. What is the empirical formula of the compound?