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ChemLab113-0034 - 5 You weigh out 0.8618 g of a pure base...

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Unformatted text preview: 5. You weigh out 0.8618 g of a pure base with a molar mass of 243.7 g/mol. The base reacts with HCl in a one-to—one mole ratio. In titrating the base sample, you use 37.22 mL of ac1d to reach the equivalence point. What is the molarity of your HCI solution? 6. What is the pH of a 0.0100 M solution of HCi in water? 7. The base sodium hydroxide dissociates completely into Na+ and OH‘ ions when it is dissolved in water. What is the pH of a 0.1000 M NaOH solution? 8. The substance re5ponsible for the sour taste of lemons is citric acid, a weak acid. Is the pH of a 0.1000 M citric acid solution greater than, less than, or equal to the pH of a 0.1000 M HCl solution? Justify your choice. 9. Ammonia (NHg) is a base that produces OH' ions in water in a manner completely analogous with carbonate ions. Write a balanced chemical equation showing the production of OH' by ammonia in water. 10. What is the average deviation for the following set of numbers? 10.13, 9.62, 9.98, 10.07. 46 ...
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