When the Pb²+ concentration is 2.45×104 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 0.507V. What is the Cr³+ concentration? 3Pb²+ (aq) + 2Cr(s)—3Pb(s) + 2Cr³+ (aq) Answer: 1.62 M

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When the Pb²+ concentration is 2.45x10-4 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is
0.507V. What is the Cr³+ concentration?
3Pb²+ (aq) + 2Cr(s)—3Pb(s) + 2Cr³+ (aq)
Answer: 1.62
Use the References to access important values if needed for this question.
M
Transcribed Image Text:When the Pb²+ concentration is 2.45x10-4 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 0.507V. What is the Cr³+ concentration? 3Pb²+ (aq) + 2Cr(s)—3Pb(s) + 2Cr³+ (aq) Answer: 1.62 Use the References to access important values if needed for this question. M
When the
Pb²+
concentration is 1.14 M, the observed cell potential at 298 K for an electrochemical cell with the following reaction is 1.154 V. What is
the
Mn²+ concentration?
Pb²+ (aq) + Mn(s) → Pb(s) + Mn²+
red
Pb²+ (aq) + 2e¯ → Pb(s) Ee
Mn²+ (aq) + 2e¯¯ → Mn(s) Fred
[Mn²+] =0
M
(aq)
= -0.126 V
-1.180 V
Transcribed Image Text:When the Pb²+ concentration is 1.14 M, the observed cell potential at 298 K for an electrochemical cell with the following reaction is 1.154 V. What is the Mn²+ concentration? Pb²+ (aq) + Mn(s) → Pb(s) + Mn²+ red Pb²+ (aq) + 2e¯ → Pb(s) Ee Mn²+ (aq) + 2e¯¯ → Mn(s) Fred [Mn²+] =0 M (aq) = -0.126 V -1.180 V
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