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Please help me solve these questions. Thank you 1. A solution of 81 ml of 0.204 M KOH is mixed with a solution of 200

Please help me solve these questions. Thank you

1. A solution of 81 ml of 0.204 M KOH is mixed with a solution of 200 ml of 0.150 M NiSO4, calculate what is the concentration of K+ that remain in the solution? Keep three significant figures after the decimal place in your answer

2. A solution of 99 ml of 0.23 M KOH is mixed with a solution of 200 ml of 0.150 M NiSO4, calculate what is the concentration of SO42- that remain in the solution? Keep three significant figures after decimal place in your answer

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