Multiple Choice
The molarity of an aqueous solution containing 75.3 g of glucose (C₆H₁₂O₆) in 35.5 mL of solution is ________.
6. Chemical Quantities & Aqueous Reactions
Molarity
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What is the concentration of K+ ions in a 0.15 M solution of K2S?
A
0.30 M
B
0.15 M
C
0.45 M
D
0.075 M
Verified step by step guidance1
Understand the chemical formula: K2S consists of 2 potassium ions (K+) and 1 sulfide ion (S2-).
Recognize that the concentration given (0.15 M) refers to the entire compound K2S.
Determine the dissociation of K2S in solution: K2S dissociates into 2 K+ ions and 1 S2- ion.
Calculate the concentration of K+ ions: Since each formula unit of K2S produces 2 K+ ions, multiply the concentration of K2S (0.15 M) by 2.
Express the final concentration of K+ ions using MathML:
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