The concentrations of HSO 4 - , SO 4 2 − and H + ions in a 0.20 M KHSO 4 solution has to be calculated. Concept Information: Acid ionization constant K a : Acids ionize in water. Strong acids ionize completely whereas weak acids ionize to some limited extent. The degree to which a weak acid ionizes depends on the concentration of the acid and the equilibrium constant for the ionization. The ionization of a weak acid HA can be given as follows, HA (aq) → H + (aq) +A - (aq) The equilibrium expression for the above reaction is given below. K a = [ H + ][A - ] [ HA] Where, K a is acid ionization constant, [ H + ] is concentration of hydrogen ion [ A - ] is concentration of acid anion [ HA] is concentration of the acid To Calculate: The concentrations of HSO 4 - , SO 4 2 − and H + ions in a 0.20 M KHSO 4 solution
The concentrations of HSO 4 - , SO 4 2 − and H + ions in a 0.20 M KHSO 4 solution has to be calculated. Concept Information: Acid ionization constant K a : Acids ionize in water. Strong acids ionize completely whereas weak acids ionize to some limited extent. The degree to which a weak acid ionizes depends on the concentration of the acid and the equilibrium constant for the ionization. The ionization of a weak acid HA can be given as follows, HA (aq) → H + (aq) +A - (aq) The equilibrium expression for the above reaction is given below. K a = [ H + ][A - ] [ HA] Where, K a is acid ionization constant, [ H + ] is concentration of hydrogen ion [ A - ] is concentration of acid anion [ HA] is concentration of the acid To Calculate: The concentrations of HSO 4 - , SO 4 2 − and H + ions in a 0.20 M KHSO 4 solution
Solution Summary: The author calculates the acid ionization constant and equilibrium constant for a weak acid HA.
43) 10.00 ml of vinegar (active ingredient is acetic acid) is titrated to the endpoint
using 19.32 ml of 0.250 M sodium hydroxide. What is the molarity of acetic acid
in the vinegar? YOU MUST SHOW YOUR WORK.
NOTE: MA x VA = MB x VB
424 Repon Sheet Rates of Chemical Reactions : Rate and Order of 1,0, Deception
B. Effect of Temperature
BATH TEMPERATURE
35'c
Yol of Oh
نام
Time
485
Buret rend
ing(n)
12
194
16.
6
18
20
10
22
24
14
115 95
14738
2158235
8:26 CMS
40148
Total volume of 0, collected
Barometric pressure 770-572
ml
mm Hg
Vapor pressure of water at bath temperature (see Appendix L) 42.2
Slope
Compared with the rate found for solution 1, there is
Using the ideal gas law, calculate the moles of O; collected
(show calculations)
times faster
10
Based on the moles of O, evolved, calculate the molar concentration of the original 3% 1,0, solution (sho
calculations)
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