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In a qualitative analysis procedure, a chemist adds HCl to an unknown group of ions and then saturates the solution with H2S so that the solution is 0.1 M in HCl and 0.10 M in H2S. (a) What is the [HS -] of the solution?
What is the [Cu2+] concentration at 25 oC in the cell Zn(s)|Zn2+(aq, 1.0 M)||Cu2+(aq)|Cu(s)? The cell emf is 1.03 V. The standard cell emf
Determine the osmotic pressure at 25 °C of an aqueous solution that is 0.028 M NaNO3. A) 1.37 atm B) 0.685 atm C) 0.0729 atm D) 0.0364 atm E) 2.06 atm
An equilibrium mixture contains 0.450 mol of each of the products (carbon dioxide and hydrogen gas) and .200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00 L container.
calculate the standard enthalpy change for this reaction using standard enthalpies of formation. general chemistry 10th edition ebbing and gammon
Enough of a monoprotic acid is dissolved in water to produce a 0.0186 M solution. The pH of the resulting solution is 2.30. Calculate the Ka for the acid.
for a certain reaction delta H=-76.8 and delta S=-217 If n=3 calculate E for the reaction at 25 degrees. Will ou please show me step by step on how to do this please
A buffer consists of a weak acid and its conjugate base. For the following pairs, indicate which is the acid and which is the base:
explain the difference or similarity in conductivity of k2c2o4 and cacl2. do the same thing for h2c2o4 and
Someday, cars may be powered by clean H2/O2 fuel cells and electric motors. Under standard conditions, such a fuel cell can develop 1.229 volts. If the oxygen is obtained from air (at P=0.21 bar), what pressure of H2 would be required to develop 1..
A solution contains 29 g of sucrose (C12H22O11), a nonelectrolyte, dissolved in 929 g of water. What is the boiling-point elevation?
What is the concentration of the vinegar in weight percent? (Assume a density of 1.030 g/mL.) If the pH of the vinegar was 3.44, what value is obtained for the Ka of acetic acid?
Calcium and Magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides,CaO and MgO, and then treat the oxide sample with HCl. If 7.695g of the oxide sample requires
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