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pH and pOH notes
May 21, 2015
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pH and pOH notes
May 21, 2015
At 2000oK, a mixture of H2, S2, and H2S rapidly reaches a
state of equilibrium represented by the equation :
2 H2S (g) <===> 2 H 2(g) + S2 (g)
An analysis of the equilibrium mixture in a 2.00 litre flask
reveals the presence of 2.00 moles of H2S and 1.00 mole of H2. If the Keq for this reaction at this temperature is 1.62 x 10­2, how many moles of S2 can we expect to find in
this flask ?
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pH and pOH notes
May 21, 2015
A sample containing 0.800 moles of POCl3 is enclosed in
a 0.500 litre vessel at a certain temperature. When the
equilibrium for the dissociation reaction POCl3 (g) <===> POCl (g) + Cl2 (g)
is attained, it is found that the vessel contains 0.259
moles of Cl2. Calculate the equilibrium constant.
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pH and pOH notes
4. May 21, 2015
2 HCl (g) <====> H2 (g) + Cl2 (g) If 2.00 mol HCl are placed in a 5.00 L flask and
allowed to come to the equilibrium shown above, what
will the equilibrium [H2] be ? (Keq = 3.2 x 10­4)
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pH and pOH notes
May 21, 2015
H2 (g) + CO2 (g) <====> CO (g) + H2O (g) If 1.50 mol of each chemical species are placed in a
3.00 L flask and allowed to achieve the equilibrium
above, what mass of CO will be present at equilibrium ?
(Keq = 3.59)
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pH and pOH notes
May 21, 2015
If the [H+] in a solution is 1.0 × 10−5M, is the solution acidic, basic, or neutral? What is the [OH−] of this solution?
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pH and pOH notes
May 21, 2015
What is the pH of a solution with a hydrogen‐
ion concentration of 4.2 × 10−10M?
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pH and pOH notes
May 21, 2015
The pH of an unknown solution is 6.35. What is the hydrogen‐ion concentration of the solution?
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pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 25 grams of hydrochloric acid (HCl) dissolved in 1.5 liters of water?
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pH and pOH notes
May 21, 2015
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pH and pOH notes
May 21, 2015
NH3 + BF3 → NH3BF3 11
pH and pOH notes
May 21, 2015
HC2H3O2 + H2O → H3O+ + C2H3O2−
H2CO3
O2–
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pH and pOH notes
May 21, 2015
If the [H+] in a solution is 1.0 × 10−5M, is the solution acidic, basic, or neutral? What is the [OH−] of this solution?
13
pH and pOH notes
May 21, 2015
What is the pH of a solution with a hydrogen‐
ion concentration of 4.2 × 10−10M?
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pH and pOH notes
May 21, 2015
The pH of an unknown solution is 6.35. What is the hydrogen‐ion concentration of the solution?
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pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 1.2 moles of nitric acid (HNO3) and 1.7 moles of hydrochloric acid (HCl) dissolved in 1000 liters of water?
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pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 1.2 moles of nitric acid (HNO3) and 1.7 moles of hydrochloric acid (HCl) dissolved in 1000 liters of water?
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pH and pOH notes
May 21, 2015
An acidic solution has a pH of 4. If I dilute 10 mL of this solution to a final volume of 1000 mL, what is the pH 5)
of the resulting solution?
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pH and pOH notes
b)
May 21, 2015
A 3.67 x 10­5 M KOH solution.
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pH and pOH notes
d)
5 L of an aqueous solution that contains 1.0 grams of HBr and 1.0 May 21, 2015
grams of nitric acid.
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pH and pOH notes
May 21, 2015
If the [H+] in a solution is 1.0 × 10−5M, is the solution acidic, basic, or neutral? What is the [OH−] of this solution?
21
pH and pOH notes
May 21, 2015
What is the pH of a solution with a hydrogen‐
ion concentration of 4.2 × 10−10M?
22
pH and pOH notes
May 21, 2015
The pH of an unknown solution is 6.35. What is the hydrogen‐ion concentration of the solution?
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pH and pOH notes
What is the pH of a solution if [OH−] 4.0 × 10−11M?
May 21, 2015
= 24
pH and pOH notes
1)
May 21, 2015
What is the pH of a solution that contains 25 grams of hydrochloric acid (HCl) dissolved in 1.5 liters of water?
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pH and pOH notes
May 21, 2015
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pH and pOH notes
May 21, 2015
27
pH and pOH notes
May 21, 2015
A 3.67 x 10­5 M KOH solution.
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pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 1.2 moles of nitric acid (HNO3) and 1.7 moles of hydrochloric acid (HCl) dissolved in 1000 liters of water?
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pH and pOH notes
May 21, 2015
30
pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 1.2 moles of nitric acid (HNO3) and 1.7 moles of hydrochloric acid 3)
(HCl) dissolved in 1000 liters of water?
31
pH and pOH notes
May 21, 2015
What is the pH of a solution that contains 25 grams of hydrochloric acid (HCl) dissolved in 1.5 liters of water?
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pH and pOH notes
b)
May 21, 2015
A 3.67 x 10­5 M KOH solution.
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pH and pOH notes
May 21, 2015
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