The cell potential for the following voltaic cell is at 25 \'C. If the standard

Question

The cell potential for the following voltaic cell is at 25 'C. If the standard cell potential () is 049 v what is the concentration of the cadmium ion soluticn 66. Nisodaq)-Cd(s)- Ni(s) + CdS(a) Salt Bridge Ni 1.0 M ? M (A) 2.0M (C) 0.066 M (B) 1.0M (D) 0.0043 M One of the recently named elements is element 117- Tennessine. Identify the missing particle in the nuclear reaction that produces this element 67. You have a sample that contains the same number of atoms of the two radioactive isotopes of Neon; Ne 3Ne. At some time in the future you find that the sample contains more Neon-24 than Neon-23. Which statement about the half lives of these isotopes is true? 68. (A) The half life of Neon-24 is shorter than the half life of Neon-23. (B) The half life of Neon-24 is longer than the half life of Neon-23 (C) Because these are both neon isotopes, the half lives are equal. (D) All nuclear processes have the same half life. 69. What would be an acceptable measurement to make with the buret shown? 30 31 (A) 30.3 ml (C) 30.33 mL (B) 31.7mL (D) 31.67 mL

Explanation / Answer

66)

Number of electron being transferred in balanced reaction is 2

So, n = 2

we have below equation to be used:

E = Eo - (0.0592/n) log {[Cd2+]^1/[Ni2+]^1}

0.24 = 0.17 - (0.0592/2) log ([Cd2+]^1/1.0^1)

log ([Cd2+]^1/1.0^1) = -2.365

([Cd2+]^1/1.0^1) = 4.317*10^-3

[Cd2+]^1 = 4.317*10^-3

[Cd2+] = 0.0043 M

Answer: D

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