Which of the following acids is the weakest? The acid is followed by its Ka value.

For the titration of 15.0 mL of 0.200 M HCl with 0.200 M NaOH. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) a) What is the initial pH? pH =  [a] b) What is the pH after the addition of 5.00 mL of NaOH ? pH =  [b] c) What is the pH after the addition of 15.0 mL of NaOH? pH =  [c] d) What is the pH after the addition of 20.0 mL of NaOH? pH =  [d]

Examine the following phase diagram and identify the feature represented by point B.

What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile and nonelectrolyte solute in 95 g of ethyl alcohol, C2H5OH ? (Poethyl alcohol= 50.0 torr at 25oC )

The reaction 2NO(g) + O2(g) → 2NO2(g) has the rate law: Rate = k[O2][NO]2 If the concentration of NO is doubled while the concentration of O2 is kept the same, the reaction rate will______

A 1.00 L of an aqueous solution contains 1.25 g of a nonionic solute. If the osmotic pressure of this solution at 25 oC is 0.2668 atm. 1) Calculate the molarity of the solution. [A] mol/L 2) Calculate the moles of the nonionic solute in the solution. [B] mol 3) Calcullate the molar mass of the nonionic solute. [C] g/mol

For the reaction , 2HI(g) → H2(g) +  I2(g), the rate of change of HI is -0.45 M/s. What is the rate of appearance of I2 ?

Consider the following reaction, for which Kc = 0.0136 at 731 K 2HI(g) ⇌ H2(g) + I2(g) Which of the following statements is always true, regardless of the conditions (temperature, pressure, etc)?

Predict the ideal van’t Hoff factor (i) for NaNO3.

Which of the following acids is the weakest? The acid is followed by its Ka value.