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1. Using a sample of 21.2 mL of a weak monoprotic acid, HX, requires 50.0 mL of 0.045 M sodium hydroxide to reach to the equivalence point. Explain what is the Ka of HX After adding 30.0 mL of sodium hydroxide, given that the pH is 4.90. ?

2. If 30.0 grams of C6H6 combines with 65 grams Br what will be the theoretical yield of bromobenzene in given reaction as C6H6 + Br2 → C6H5Br + HBr also find out percentage yield when actual yield of bromobenzene was found 56.7 g?

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