Calculate [OH - ] and pH for each of the following strong base solutions. Rememb

Question

Calculate [OH-] and pH for each of the following strong base solutions.

Remember to calculate Molarity of the solutions in part b) .

M = {(mass / molar mass) / Liters of soln}

(a) 0.0053 M KOH
[OH-] = M
pH =

(b) 2.155 g of KOH (MM of KOH is 56.106 g/mol)in 540.0 mL of solution
[OH-] = M
pH =

Calculate [OH-] and pH for each of the following strong base solutions. Remember to calculate Molarity of the solutions in part b) . M = {(mass / molar mass) / Liters of soln} Mconc. x Ldilute (a) 0.0053 M KOH [OH-] = M pH = (b) 2.155 g of KOH (MM of KOH is 56.106 g/mol)in 540.0 mL of solution [OH-] = M pH = x Lconc. = Mdilute

Explanation / Answer

1-[OH-]= 0.0056 M
pOH = - log 0.0056= 2.3
pH = 14 - 2.3 = 11.7

2-KOH (MM of KOH is 56.106 g/mol)in 510.0 mL of solution
[OH-] = M
pH = 12.81

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