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please answer all questions,thank you a lab tech mkes a 5.43x10 -5 mol/L solution of calcuim hydroxide (Ca(OH) 2 ). a) what is the concentration

please answer all questions,thank you

a lab tech mkes a 5.43x10^-5 mol/L solution of calcuim hydroxide (Ca(OH)₂).

a) what is the concentration of hydroxide atoms OH- in this solution?

b) what is the pOH of this solution

c) what is the PH of this solution

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