Please answer this question fully and please please answer it if you\'re 100% su
ID: 1061301 • Letter: P
Question
Please answer this question fully and please please answer it if you're 100% sure of the correct answer and mark the answer please! Thank you! A cyanide ion-selective electrode obeys the equation given below E Constant 0.05916 log[CN The potential was -0.230 V when the electrode was immersed in 1.00 mM NaCN. (a) Evaluate the constant in the preceding equation. (b) Using the result from part (a), find [CN if 0.286 V. HINT: Use several extra significant figures in your answer from part (a) when calculating the answer to part (b) to avoid rounding errors. M (2 significant figures)Explanation / Answer
(a) Evaluate the constant in the equation.
answer = -0.407
E = K – 0.05916 log [CN–]
-0.230 = K – 0.05916 log (1.00 x 10-3)
Constant, K = -0.407 V
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, find [CN-] if E = -0.286 V.
-0.286= -0.407 – 0.05916 log [CN–]
[CN–] = 1.55 x10^-2 M