istry # /assignment/611 0982 e Homework Chapter 16 hemistry.com/myct/itemView?as
ID: 1033888 • Letter: I
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istry # /assignment/611 0982 e Homework Chapter 16 hemistry.com/myct/itemView?assignmentProblemiD 96451486 16 ng Base for Lat K11 of 17 Grading 0 20 g of hydrogen chioride (HCI) is dissolved in water to make 20 L of solution What is the pH of the resulting hydrochioric acid solution? omplete Express the pH numerically to two decimal places cate the a solution View Awailable Hints) ry ?eous on and the are related to 10-14 Submit H and pOH Part B 0.70 g of sodium hydroxide (NaOH) pellets are dissolved in water to make 8.0 L of solution What is the pH of this solution? Express the pH numerically to two decimal places View Available Hint(s)Explanation / Answer
molarity = W/G.M.Wt * volume of solution in L
= 0.2/36.5*2 = 0.00274M
HCl(aq) ---------------> H^+ (aq) + Cl^- (aq)
0.00274M 0.00274M
[H^+] = [HCl]
[H^+] = 0.00274M
PH = -log[H^+]
= -log0.00274
= 2.56
molarity = W/G.M.Wt * volume of solution in L
= 0.7/40*8 = 0.00219M
NaOH (aq) ---------------> Na^+ (aq) + OH^- (aq)
0.00219M 0.00219M
[OH^-] = [NaOH]
[OH^-] = 0.00219M
POH = -log[OH^-]
= -log0.00219
= 2.6595
PH = 14-POH
= 14-2.6595
= 11.34
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