To write the balanced chemical equation for the reaction of aluminium and sodium hydroxide and predict the volume of H 2 gas produced. Concept introduction: Aluminium belongs to group 3A of the periodic table. It react with a base like sodium hydroxide to produce sodium aluminate and hydrogen gas. There is evolution of heat and the reaction is highly exothermic. Hydrogen gas is released rapidly. Ideal gas equation is, P V = n R T Where P, V, T, n, and R are the pressure, volume, temperature and amount of substance respectively.

Question

Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) from the introduction. (a) Assuming an excess of the other reagents, from one mole of aluminum Al (s), how many moles of alum will be produced? (b) Assuming an excess of the other reagents, from one mole of potassium hydroxide KOH, how many moles of alum will be produced? (c) Assuming an excess of the other reagents, from one mole of sulfuric acid H2SO4 , how many moles of alum will be produced? (d) If you start the synthesis with 1.00 g of Al, 40.0 mL of 1.50 M KOH, and 20.0 mL of 9.00 M H2SO4 , which of the three will be the limiting reagent? (e) Assuming that the product is anhydrous (that there are no waters of hydration), calculate the theoretical yield of alum, in grams, based on the amounts of reagents in part (d). 3. Consider the nickel salt: (NH4 )2Ni(SO4 )2 ·y H2O (Ammonium Nickel Sulfate Hydrate), where y is the number of coordinated waters. (a) Assuming that the product is anhydrous (y = 0),…

Answer 1

Question

Chapter 21, Problem 49PS

Interpretation Introduction

Interpretation:

To write the balanced chemical equation for the reaction of aluminium and sodium hydroxide and predict the volume of H2 gas produced.

Concept introduction:

Aluminium belongs to group 3A of the periodic table. It react with a base like sodium hydroxide to produce sodium aluminate and hydrogen gas. There is evolution of heat and the reaction is highly exothermic. Hydrogen gas is released rapidly.

Ideal gas equation is,

PV=nRT

Where P, V, T, n, and R are the pressure, volume, temperature and amount of substance respectively.

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