UNITÉ 6
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Appuyez sur le bouton pour la solution |
NUMÉRO |
RÉPONSES |
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1 |
a) pH = 7,0 b) pH > 7,0 c) pH < 7,0 d) pH < 7,0 |
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2 |
pH = 8,4 |
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3 |
pH = 5,1 |
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4 |
[sel] = 0,11 mol/l. |
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5 |
pH = 5,6 |
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6 |
pH = 4,4 |
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7 |
pH = 5,2 |
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8 |
6,46×10–4 |
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9 |
Ka = 1,0×10-3. |
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10 |
0,24 gramme. |
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11 |
À demi-neutralisation, pH = pKa. pH = 4,34 |
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12 |
9,93 ml. |
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13 |
pH avant addition de HCl = 3,97 pH après addition de HCl = 3,21 |
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14 |
3,2×10-4. |
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15 |
pH = 8,63. |
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Courriel au professeur Claire Mathieu
Conception J-Marc Gagnon
1999
