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1.What is the pH at the equivalence point when 0.100 M weak acid HA (Ka =...

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Chemistry

1.What is the pH at the equivalence point when 0.100 M weak acidHA (Ka = 1.48 x 10 - 4) is titrated with 0.050 M KOH?

2.Calculate the pH of a solution made by mixing 50.00 mL of0.100 M KCN with 4.33 mL of 0.425 M strong acid HCl. HCN pKa =9.21

3.Strong bases, NaOH and KOH can not be used as primarystandards because of the presence of ______________ A.carbonateB.water C.adsorbed water

please explain each step by step, thank you

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