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5. List 5 strong acids. You can use name or chemical formula.6. Nitrous acid (HNO2) is a weak acid. When a 0.5 M aqueous solution of nitrous acidreaches equilibrium, the pH is measured to be 1.78. Using this information, calculate Keq(same as Ka) for nitrous acid.10 pts7. Identify the conjugate base of nitrous acid.
8. A 0.5 M solution of NaNO2is prepared. Its pH is measured. Is the pH more or less than7? (Note: an answer of “more than 7” or “less than 7” will suffice. If you successfullycalculated the Kafor nitrous acid in problem #6, you can use it to calculate the exact pHof the solution and gain 5 extra points.)10 pts5 pts extra9. A student makes up a 1.5 M solution of HCl. What is the pH of this solution?10. A student makes up a 0.5 M solution of benzoic acid (C6H5COOH). ThepKaofbenzoic acid is 4.19.