Inorganic Chemistry Answers

What is the value of the activation energy for a reaction if at 298K the rate constant is 10 s-1 and when measured at 308K the value increases to 25 s-1 (using Arrhenius Equation)?

The pH of a 0.0516 M solution of nitrous acid, HNO2, is 2.34. What is its Ka?

What is the pH of a solution of HCl with a concentration of 1.2 X 10
-3 M?

If the rate of reaction doubles for every 10 °C rise in temperature, how much faster does
the reaction proceed at 45 °C than at 25 °C? At 95 °C than at 25 °C?

What is the density of ethane gas, C2H6, at a pressure of 183.4 kPa and a temperature of
25 °C?

What is the pressure in kilopascals in a 35.0 L balloon at 25 °C filled with pure hydrogen
gas produced by the reaction of 34.11 g of CaH2 with water?

What volume of 0.0125 M hydrogen bromide solution is required to titrate 250 ml of a
0.0100 M calcium hydroxide solution?

What is the limiting reagent when 0.50 mol of Cr and 1.0 mol of H3PO4 react according
to the following chemical equation?
2Cr + 2H3PO4 → 2CrPO4 + 3H2
If 0.20 mol of CrPO4 is recovered from the reaction described above, what is the percent yield?

Calculate the molarity of a concentrated H2SO4 solution of density 1.84 g/ml and
containing 98.0 % H2SO4 solute by mass

Is lead (II) iodide more or less soluble in a solution of 0.1M NaI than it is in pure water?