What is the hydronium-ion concentration of a 040 m solution
What is the hydronium-ion concentration of a 0.40 M solution of HCN (Ka= 4.9×10-10) at 25° C?
A. 2.0×10-4 M
B. 3.6×10-6 M
C. 2.4×10-6M
D. 1.4×10-5 M
E. 3.5×10-5 M
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