Which substance in the given pairs has the higher entropy value ? a) HNO3(aq) or b) HNO3(l) a) C2H5OH(l) or b) C3H7OH(l) a) HCl(g) or b) HBr(g)

1. Select the strongest acid from the following: A) HClO or HClO2 B) HI or HBr 2. Select the strongest base from the following: C) NO2- or NO3- 3. Which will be more soluble in an acidic solution? D) CuCO3 or CuBr2

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

For the titration of 15.0 mL of 0.400 M HCl with 0.200 M NaOH. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) a) What is the initial pH? pH =  b) What is the pH after the addition of 5.00 mL of NaOH ? pH =  c) What is the pH after the addition of 30.0 mL of NaOH? pH =  d) What is the pH after the addition of 35.0 mL of NaOH? pH = 

Calculate the pH of a solution that contains 3.9 × 10-5 M H3O+ at 25°C.

Calculate the hydroxide ion concentration in an aqueous solution with a pH of 3.00 at 25°C.

Are the following solutions acidic, basic, or neutral? a) Ba(NO3)2(aq) b) NaClO2(aq) c) NH4ClO4(aq)

The pH of a 1.75 M solution of weak acid HA is 3.25. Calculate the value of Ka for HA.

At 298 K , ∆H = 520.0 kJ and ∆S = 184 J/K for the reaction shown below. MnO2(s)  ⟶ Mn(s) + O2(g) (a) Use the data to decide if this reaction is spontaneous at 298 K. (b) What is the temperature above which the reaction is spontaneous?

Which of the following is true when ∆G = 0?