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A 20 mL sample of a 0.1000 M unknown acid solution is titrated with 0.1000 M NaOH. Given the acid is diprotic and its pKa is 1.90 and 6.70, estimate the PH after 10 mL of base are added? After 20 mL basea added? After 30 mL Base added?
If 125 calories of heat is applied to a 60.0 grams piece of copper at 21.0 degrees Celsius, what will the final temperature be? The specific heat of copper is 0.0920 calories per grams times Celsius.
Determine the mass percentage concentration of a sodium hydroxide solution produced by mixing 50.0 mL of a 25 % (density=2.45g/mL) sodium hydroxide solution with 10.0mL of H 2 O?
Determine how much heat is evolved or absorbed when 30.0 of lithium iodide completely dissolves in water.
you have 505ml of a .170m HCL solution and you want to dilute it to exactly .100M. how much water should you add?
It requires 20.65 mL of 0.3000 M NaOH solution to titrate both acidic protons in 40.00 mL of the tartaric acid solution Write the net ionic equation.
2.0 moles of a nonelectrolyte solute are added to 1.0 kg of an unknown solvent. The freezing point is depressed by 7.9 K. Calculate the molal freezing point constant (Kf?) for this solvent.
The quantity of atmoshperic SO2 (g) can be determined by reaction with H2O2 (aq), according to the balanced chemical equation...
a 50 ml solution containing NaBr was treated with excess AgNo3 to precipitate 0.2146g of AgBr. what is the molarity of NaBr in the solution.
Explain the fact that even though dibenzoylmethane is not a methyl ketone it gives a positive iodoform test
what is the energy difference between the heats of formation you calculated for carbocation A and B?
Decide whether or not each of the following metals dissolves in 1 {rm M} {rm HCl}. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.
Compute the mass of solute and water needed to prepare the following solutions: 1. 150 g of 1.00 m (NH4)2SO4: (a) from pure solid (NH4)2SO4 (b) from solid (NH4)2SO4 with a purity of 87.2 wt-% 2. 1.50 L of a 20 wt-% Pb(NO3)2 solution whose density ..
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