pH of a Mixed Buffer Solution
A buffer solution is made of 0.100 M HOCl and 0.250 M NaOCl. What is the pH of the resulting solution when a 15.0-mL portion of 0.200 M HCl is added to 100.0 mL of the buffer?
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Solution Preview
You need the buffers mathematical equation, and to be able to identify each speices.
Ka = [H+] x (A-/HA)
Ka is the Ka of the acid HA
[H+] is your pH term (your answer in most cases)
A- is the conjugate species of the acid HA
HA is the acid that we have the Ka value for...
Setting up the BUFFER equation...
Ka = [H+] x 0.250/0.100
From this we can find the pH before the ...
Solution Summary
The solution explains the steps necessary to find the pH of a buffer solution after some HCl is added in almost 300 words.
Acids/bases 2
1. Equal molar amounts of hydrochloric acid and potassium hydroxide are mixed together in water. Is the resulting solution acidic, basic, or neutral?
2. Equal molar amounts of hypochlorous acid and sodium cyanide are mixed together in water. Is the resulting solution acidic, basic, or neutral? Ka hypochlorous acid = 3.5 x 10-8 ; Ka hydrocyanic acid = 4.9 x 10-10
3. Equal molar amounts of benzoic acid and sodium acetate are mixed together in water. Is the resulting solution acidic, basic, or neutral? Ka benzoic acid = 6.3 x 10-5 ; Ka acetic acid = 1.7 x 10-5
4. Suppose you want to make an acetic acid-sodium acetate buffer solution that maintains a pH of 5.00. How many grams of sodium acetate should be dissolved in 1.00 L of 1.150 M acetic acid? Ka acetic acid = 1.7 x 10-5
5. Which of the following, when added to water, will give a solution that has a pH > 7 : NaClO4 LiNO2 , NiCl2, Sr(NO3)2
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