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When electricity (the flow of electrons) is passed through a solution, it causes an oxidation-reduction (redox) reaction to occur. If the solution contains a metal cation such as \rm Ag^+, the flow of electrons will reduce the silver ion, causing solid silver to plate onto the electrode. The amount of metal plated depends on the number of electrons passed.
The total charge of a mole of electrons is 96,500 coulombs (\rm C) and
1 ampere (A) = 1 coulomb/second\; (C/s)
What mass of Cu{(s)} is electroplated by running 13.5 A of current through a {Cu}^{2+}{(aq)} solution for 4.00 \rm h?
How many minutes will it take to electroplate 36.1 g of gold by running 5.00 \rm A of current through a solution of {Au}^{+(aq)}?
What the Ideal and Van der Waals Pressure of ethane gas at temperature of 500K and Molar Volume of 7.28 x 10^-5 m^3/mol?
A syringe containing 1.64mL of oxygen gas is cooled from 95.9°C to 0.8°C. What is the final volume of oxygen gas?
A plot o f the reciprocal concentration of chemical A versus time yielded a straignt line with a slope
What would be the best indicator for the titration of 0.20 M CH3COOH titrated with 0.2 M NaOH? (Ka for acetic acid = 1.8 X 10-5) The pH ranges for the color change of some common acid base indicators are given below
At a potential of -1.00 V vs. SCE, carbon tetrachloride (CCl4) in methanol undergoes a reduc- tion to chloroform (CHCl3) at a mercury cathode:
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage of copper and zinc in the original sample of bra..
How many grams of CO2 were used during the month? molar mass of CO2 is 44.00995 g/mol.
What are the equilibrium pressures of N2O4 and NO2 when 0.61 mol of each gas are introduced
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat
Does the product xyz necessarily vanish when integrated over a a) cube, b) tetrahedron, c) hexagonal prism, each centered on origin?
A student takes 148. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0x35.0x25.0 cm bag to a pressure of 1.20 atm at 26 degress C.
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