Assignment:
Q1. Calculate [OH-] for 2.170 g of LiOH in 300.0 mL of solution. [OH-] = ? M
Q2. How many moles of HF (Ka = 6.8 x 10-4) must be present in 0.160 L to form a solution with a pH of 3.30?
Q3. Calculate the molar concentration of [OH-]ions in a 7.0×10-2 M solution of ethylamine (C2H5NH2) (Kb= 6.4 x 10-4).
Q4. Calculate [OH-] and pH for a solution of 7.0 x 10-2 M NaCN?
Q5. What is the pH of a solution that is 3.0×10-9 M in NaOH? Would I do the log (3.0 x 10-9) and then subtract that number from 14 in order to get the pH?
Q6. How many milliliters of concentrated hydrochloric acid solution (36.0% HCl by mass, density = 1.18 g/mL) are required to produce 10.0 L of a solution that has a pH of 1.99?
Provide complete and step by step solution for the question and show calculations and use formulas.