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I can't solve these. Can someone explain the answers to these questions?

0/1 pts Question 3 The pOH of the solution of 2.8 x 104 M Ca(OH)2 is 3,25 10.45 3.55 10.75 7.000/1 pts Question 4 The pH of the solution of 5.7 x 1011 M HBr is 7.00 3.76 10.24 5.59 6.280/1pts Question 5 The pOH of the solution of 3.3 x 1010 M LIOH is 7.00 9.48 12.4 6.12 4.52Question 6 The pH of 3.7 x 10-8 M HCI i 6.88 6.21 7.43 6.92 6.75Question 7 The pOH of 2.9 x 107 M KOH is 6.49 6.53 7.51 6.27 7,46

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Answer #1

3 Ca (o2 Cot2 So, CoH CoH- -2x 2.8x10 M) S.6X10M poHe -log Con paH 1g(56x10) poH= 3.25

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