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4 months ago

Chemistry Chemistry Electrochemistry

250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1M AgNO3 and 0.1M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The metal/metals electrodeposited will be : (E°Ag+/Ag = 0.8 V, E°Au+/Au = 1.69 V)

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Vishal Baghel

Contributor-Level 10

Charge (q) = (it/96500) F = (1x15x60)/96500 = 900/96500 = 9/965 F = 0.0093F
No. of moles of Au? = 0.025 & No. of moles of Ag? = 0.025
Species with higher value of SRP will get deposited first at cathode.
(i) Au? (aqs) + e? → Au (s)
0.025 0.0093 mole
So only Au will get deposited

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Chemistry Class 12th

The processes of calcination and roasting in metallurgical industries, respectively, can lead to:

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Vishal Baghel

Contributor-Level 10

In Calcination and roasting CO? and SO? are released which are responsible for Global warning and acid rain.

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4 months ago

Chemistry Coordination Compounds

The Crystal Field Stabilization Energy (CFSE) of [CoF₃(H₂O)₃](Δo < P) is :

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Vishal Baghel

Contributor-Level 10

[Co (H? O)? F? ]Co³? = 3d?4s? ⇒ t? g²? ¹? ¹ e? ¹? ¹
CFSE = [−0.4nt? g + 0.6neg]? o + n (P)
= [−0.4 * 4 + 0.6 * 2]? o + 0 = −0.4? o

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Chemistry Ncert Solutions Chemistry Class 11th

For one mole of an ideal gas, which of these statements must be true?
(a) U and H each depends only on temperature
(b) Compressibility factor z is not equal to 1
(c) Cp,m – Cv,m = R
(d) dU = CvdT for any process

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