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1. A galvanic cell uses the following solutions: 1.5 M Cr2(SO4)3 in 0.8 L of water and 0.8 M Au(NO3)3 in 1.2 L of water. Write the balanced chemical equations of the dissolution of Cr2(SO4)3and Au(NO3)3 into ions in water.
2. The galvanic cell includes solid bars of gold (Au) and chromium (Cr). Using your answer in Problem 10.2 and the table of standard reduction potentials write the following:
Oxidation half-reaction:
Reduction half reaction:
Overall balanced reaction:
Voltage of the galvanic cell:
3. Recall that at the cathode, positive ions in solution are reduced into the solid form. The galvanic cell will stop working when all of the ions in solution are reduced to the solid form. For the galvanic cell in 10.2, identify the ion that is being reduced at the cathode and calculate the total number of moles of the ion in solution at the beginning of the reaction.
Give the products of the following reactions (no reaction mechanism necessary). if the products can exist as stereoisomers, show which stereoisomers are obtained.
For the reaction of the ammonium ion with nitrous acid, the net reaction is NH4 (aq) + HNO2(aq) yields N2(g) + 2H2O (l) + H (aq) If the initial concentration of nitrous acid is 1.00 M and after 48.1 s has elapsed, the concentration of nitrous acid..
What is the final state of the system after 26.0 kJ of energy is removed from 150.0 g of water at 1 atm. The water has an initial temperature of 20.0?C . Cs(ice) 2.092 J/g?C Cs(water) 4.184 J/g?C ?Hfus ice 6008 J/mol
Question- Some instruments differentiate individual quanta of electromagnetic radiation based on their energies. Assume such an instrument has been adjusted to detect quanta that have 3.75x10^-18 J of energy. Explain what is the wavelength of the ..
what is the rate constant of a first-order reaction that takes 2.50 minutes for the reactant concentration to drop to
An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1nm. What is the value of n for the level to which the electron relaxed
The solubility of ammonium chloride at 70. C is 60. g of solute per 100. g of water. Which solution would be saturated at 70. C
Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.
An ideal gas in a sealed container has an initial volume of 2.40 L. At constant pressure, it is cooled to 10.00 °C where its final volume is 1.80 L. What was the initial temperature
While 1.199 mole of naphthalene (C10H8), a solid is burned in a constant- volume bomb calorimeter at 298K, 48.19 kJ of heat is evolved. Compute delta U and w for the reaction on a molar basis.
The titration of 25.0 mL of 0.00 M base (B) by 0.500 M HCl for which the following data was collected. Volume of HCl added (mL) pH
How can we explain the ability of an electron to cross through a node, such as the nucleus, to occupy the region within an entire orbital?
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