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What is the hydroxide-ion concentration in a solution formed by combining 200. mL of 0.15 M HCl with 300. mL of 0.091 M NaOH at 25ºC?HCl(aq) + NaOH(aq) ? NaCl(aq) + H2O(l)
A. 0.055 M
B. 1.7 10-13 M
C. 1.0 10-7 M
D. 1.9 10-12 M
E. 0.091 M
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