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2. Given a solution of hydrocyanic acid (HCN), what additional regent or reagents are needed to prepare a buffer from hydrocyanic acid solution? a. Explain how this buffer solution resists a change in pH when moderate amounts of strong acid are added. Use a chemical equation in your explanation. b. Explain how this buffer solution resists a change in pH when moderate amounts of strong base are added. Use a chemical equation in your explanation. a. 3. A buffer solution contains 0.20moles of methanoic acid, HCOOH, and 0.30 moles of sodium methanoate, NaCOOH, in 1.00L of the buffer. The acid ionization constant, Ka, of methanoic acid is 1.8x10-4. Calculate the pH of this solution. b. Compare the capacity of this buffer to neutralize added acid to its capacity to neutralize added base. Explain your answer completely. If 0.10moles of HCl gas solution were bubbled through a liter of the buffer, what would happen to the pH? How would this addition affect the buffer's capacity to neutralize added acid and base in the future? Answer the question fully, including equations and calculations where necessary. C.