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Unformatted text preview: estrada (gse77) – Homework 6 – Sutcliffe – (52410) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Pick the name and formula that do NOT match. 1. HBrO 4 : perbromic acid 2. HCN : hydrocyanic acid 3. H 2 CrO 4 : chromic acid 4. H 2 PO 4 : phosphoric acid correct Explanation: Phosphoric acid is H 3 PO 4 . Brom ic acid is HBrO 3 . Per brom ic acid has one more oxygen atom, so its formula is HBrO 4 . HCN is hydrogen cyanide. In aqueous solu- tion, HCN is known as hydro cyan ic acid. CrO 2 − 4 is the chrom ate ion. H 2 CrO 4 is chromic acid. 002 10.0 points Which of the following is NOT a property of bases? 1. Bases make indicators change colors. 2. Bases feel slippery. 3. Bases react with acids. 4. Bases produce hydrogen ions, H + , when added to water. correct 5. Bases taste bitter. Explanation: Bases have a bitter taste and have a slip- pery feel. They also react with acids to form salts. Both acids and bases give chracter- istic colors with indicators. However, bases produce hydroxide ions, OH − , in aqueous so- lution, not hydrogen ions, H + . 003 10.0 points When added to water, an Arrhenius acid 1. raises the pH of the solution. 2. produces hydronium ions. correct 3. produces hydrogen atoms. 4. produces hydroxide atoms. Explanation: Arrhenius acids produce hydronium ions (H 3 O + ) in solution and lower the pH of the solution. 004 10.0 points In the reaction Ca(H 2 O) +2 6 + H 2 O → Ca(H 2 O) 5 (OH) + + H 3 O + the calcium compound on the left acts accord- ing to the Bronsted-Lowry theory as 1. a salt....
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- Spring '07
- pH, Acids, Hydronium, ESTRADA