### A current of 5.18 A is pass through a Cr(NO3)2 solution

Jun 03, 2012 · You look at Cr (NO3)2 so Cr is +2 (you know NO3 is -1) and it must be going to zero to plate. You also are right that 96,485 x 2 Coulombs will plate about 52g. So you have 5.18 x 1.2 x 60 x 60 = about 22,378 C. Therefore, you will plate. 52 x (22,378/96,486*2) = about 6 g. If your equation were. Answered:The coefficients in front of Cr(OH)4 bartlebySolution for The coefficients in front of Cr(OH)4 and ClO in the balanced reaction for basic conditions are:Cr(OH)4(aq) + ClO(aq)

### Chromium - Gordon England

Chromium is the 22nd most abundant element in Earth's crust. Although rare, deposits of native chromium exist. Chromium is mined as chromite (FeCr2O4) ore. Chromium has a wide range of oxidation states, with +3 the most stable, +3 and +6 are the most common, while +1, +4 and +5 are less common. Metal alloys account for 85% of the use of chromium. ClO (aq) + Cr(OH)3(s) CrO42-(aq) + Cl (aq) Reduction1.0 kg Al(1000 g / 1 kg)(1 mol Al / 26.98 g of Al) = 37.06 mol Al Al3+(aq) + 3e-ÆAl(s) 37.06 mol Al (3 mol e-/ 1 mol Al) = 111.29 mol e-n = I·t·F-1 Therefore:t = n·F·I-1 n = 111.29 mol e-F = 9.648×104 C·mol-1 I = 100.0 A t = (111.29 mol)(9.648×104 C·mol-1)/(100.0 A) = 1.07×105 s 8s B Effects of Cr3+ mol% on the structure and optical Jun 01, 2015 · When the Cr 3+ mol% is increased further than 0.01% Cr 3+, the luminescence intensity starts to reduce and that is attributed to the well-known concentration quenching, which occurs due to the decrease in CrCr distance . Thus, an increase in Cr 3+ mol% modifies the defects levels and local environment of the emission centres .

### Electrolysis - University of Sydney

\ moles of electrons = 0.126 x 8940 / 96487 = 1.167 x 10-2 mol. Calculate the moles of H 2 produced. From the equation above, moles of H 2 = ½ x moles of electrons = (1.167 x 10-2) / 2 = 5.84 x 10-3 mol Calculate the volume of hydrogen produced. Use the ideal gas equation rewritten as V = nRT / P where n = 5.84 x 10-3 mol R = 8.314 JK-1 mol-1 How long would a constant current of 4.5 amperes be How long would a constant current of 4.5 amperes be required to flow in order to plate out 15 grams of chromium from a chromium III sulfate solution? Please explain! Question:How long would a constant current of 4.5 amperes be required to flow in order to plate out 15 grams of chromium from a chromium III sulfate solution? Please explain! PWHT Temp for 1.25 Cr - 0.5 Mo - Metal and Metallurgy Jul 23, 2004 · PWHT Temp for 1.25 Cr - 0.5 Mo. roniprabowo (Mechanical) (OP) 22 Jul 04 23:49. Dear all, I have an Heat Exchanger made by 1.25 Cr - 0.5 Mo (SA 387). AS per ASME VIII PWHT for P4 min temp is 593 C. But Our project spec stated that PWHT temp min is 670 C. I also read from KOBE cataloque temp min PWHT is 670 C.

### Sunlight-activated long-persistent luminescence in the

Nov 20, 2011 · In the development of Cr 3+-activated NIR laser crystals, gallates, such as Ln 3 Ga 5 O 12 (Ln=Y, Gd, La or Lu; ref. 12), LiGa 5 O 8 (ref. 13), M 3 Ga 2 How many minutes will it take to plate out 2.19 g of Jan 15, 2020 · Answer :The time it take to plate out will be, 3.69 minutes. Explanation :First we have to calculate the moles of Cr. Molar mass of Cr = 51.9 g/mol. The cathode half-reaction is, From this we conclude that, The number of electrons (n) in the reaction are 3. The quantity of charge required for the reduction of 1 mole of =