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Unformatted text preview: Chem 171 Quiz 8 Version A 1. A triprotic acid (H 3 A) of mass 0.5740 g was dissolved in water. It required 34.65 mL of a 0.550 M KOH (aq) solution for neutralization. What is the equivalent mass of the acid? Write the molecular eq. Show the phases. H 3 A (aq) + 3 KOH (aq) K 3 A(aq) + 3H 2 O(l) 0.03465 L x 0.550 mol KOH / L = 0.01906 mol KOH 0.01906 mol KOH = 0.01906 equiv of acid 0.5740 g / 0.01906 equiv acid = 30.1 g / mol 2. Write the molecular equation, total ionic, and net ionic equation for the neutralization of magnesium hydroxide, a typical hydroxide used in antacids. Show phases. Identify the spectator ion/s. Mg(OH) 2 (s) + 2 HCl (aq) MgCl 2 (aq) + 2 H 2 O (l) Mg(OH) 2 (s) + 2 H + (aq) + 2 Cl - (aq) Mg 2+ (aq) + 2 Cl- (aq) + 2 H 2 O (l) Mg(OH) 2 (s) + 2 H + (aq) Mg 2+ (aq) + 2 H 2 O (l) Cl- (aq) is a spectator ion Chem 171 Quiz 8 Version B 1. How many equivalents of sulfuric acid will be needed to neutralize 25.00 mL of 0.0345 M aluminum hydroxide solution? Write the molecular equation. Show the phases....
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This note was uploaded on 02/21/2012 for the course ENGLISH 101 taught by Professor Smith during the Spring '07 term at Rutgers.
- Spring '07