1) What is the concentration of K + in 0.15 M of K 2S?
2) If CaCl2 is dissolved in water, what can be said about the concentration of the Ca 2+ ion?
a. It has the same concentration as the Cl − ion.
b. Its concentration is half that of the Cl − ion.
c. Its concentration is twice that of the Cl − ion.
d. Its concentration is one-third that of the Cl − ion.
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