The questions read as follows: 1. A brand of carbonated beverage has a pH of 3.1

Question

The questions read as follows:

1. A brand of carbonated beverage has a pH of 3.16. What is the hydronium-ion concentration of the beverage?

2. A 0.010M solution of ammonia, NH3, has a pH of 10.6 at 25°C. What is the concentration of hydroxide ion?

Map of the important equations in Chapter 1 and when to use them. (OH - )H,0 10 (OH) | [H, 0) or 1 10 TH, 0 I H,0- pH - 10 ||-logH,0 (OH -- 10-0- POH log(OH" ) - PH POH = 14-pH pOH pH = 14-pOH In the above to try these book map exercises from the Exercise 19 A hand of carbonated beverage has pill 16 hydroniumion concentration of a of I What is the . the newerage Mercise ISIO and M solution of ammonia, NHL has a of iOS at , pill 2se what is the concentration of

Explanation / Answer

1) Given that pH = 3.16

pH = -log [H+] = -log [H3O+]

[H3O+] = 10-pH

= 10-3.16

= 6.9 x 10-4

Therefore,

hydronium-ion concentration of the beverage = 6.9 x 10-4

2)

Given that [NH3] , C = 0.01 M

pH = 10.6

pOH = 14 -pH = 14- 10.6 = 3.4

[OH-] = 10-pOH

= 10-3.4

= 3.98 x 10-4 M

Therefore,

concentration of hydroxide ion = 3.98 x 10-4 M

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