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A concentration cell is constructed at 25 ºC based on the Zn/Zn2+ electrode. The concentration of Zn2+ is known to be 1.3 M at the positive electrode. If the cell voltage is initially 0.1049 V, what is the concentration at the negative electrode?
Data: Zn2+ + 2e- → Zn E° = -0.76 V
Round your answer to two significant figures.
to form a molecule with an octahedral electron geometry what set of pure atomic orbitals must be mixed?
what is the strongest base that may exist in water? what happens to stronger bases? use methoxide ch3o1- as an
How many mL of 0.380 M solution can be prepared by dissolving 4.00g of Ca(OH)2 in water?
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If 110. g of ethanol is needed for a chemical reaction, how many litres of ethanol would be required. (The density of ethanol is 0.789 g/ml).
In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the attractive force holding those ions together).
Calculate the OH- concentration of a solution that has a [H3O+] of 3.5 x 10-10M. Calculate the [H3O+] of a solution that has an [OH-] of 0.0000060M. Is the solution acidic, basic or neutral
Calculate the pH of a water at 25oC that contains 3.69 mg/L of carbonic acid. You may assume that the concentrations of carbonate and hydroxide are negligible and that there are no other ions present in solution.
Calculate the size of the quantum involved in the excitation of (a) an electronic oscillation of period 1.0 fs, (b) a molecular vibration of period 10 fs, (c) a pendulum of period 1.0s Express the results in joules and kilojoules per mole.
a mixture conntains two compound that absorbs strongly in the 300-600nm range the molar absorptivities of the two compounds at two wavelenghts in this range are shown in the table compound molar absorptivity at 400 nm mola..
The combination reaction between hydrogen with oxygen generates tremendous amount of heat. Depict a reaction profile for the reaction and explain whether it is exothermic or endothermic.
Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one mole of Ca(s) is 192 kJ.
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