CHEM #5 homework (1)

CHEM #5 homework (1) - Module 5 EOC Assignment Part1 Due by...

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Module 5 EOC Assignment – Part1 Due by 3/24 Chapter 18 - 1, 5, 7, 13, 18 Chpt18 #1 Explain why for all (a) Ammonia is a weak base. It disassociates in water and when NH 4 Cl is added it is 100% dissociated into NH 4 + and Cl - in water. Due to common ion NH 4 + the dissociation of NH 3 will decrease, so the concentration of OH - decreases. (The concentration of H 3 O + will be more. pH and H 3 O + are inversely released, and the H 3 O + concentration increases, meaning pH will decrease. (b) pH will increase. Acetic acid is a weak acid, and associates in water. Sodium acetate, NaCH 3 CO 2 is 100% dissociated into its ions Na + and CH 3 CO 2 - in water. Due to common ion CH 3 COO - the dissociation of acetic decreases, so the concentration of H 3 O + will decrease, and as said before, since pH and H 3 O + are inversely related that’s why the pH increases. (c) No change in the pH. NaOH is a strong acid, and a strong base. So it will be completely ionized. NaCl is a salt of a strong base and strong acid. So there will be no effect on the ionization of NaOH because it is a strong base.
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This note was uploaded on 11/16/2008 for the course CHM 152 taught by Professor Thomas during the Fall '08 term at Pima CC.

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CHEM #5 homework (1) - Module 5 EOC Assignment Part1 Due by...

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