객관식
What volume (in liters) of a 1.5 M KOH solution is required to obtain 3.0 moles of KOH?
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6. Chemical Quantities & Aqueous Reactions
Molarity
Multiple Choice
What is the concentration of sodium ions in a 0.300 M Na2SO4 solution?
A
0.300 M
B
0.600 M
C
0.150 M
D
0.900 M
검증된 단계별 안내1
Identify the chemical formula of the compound: sodium sulfate is Na\_2SO\_4, which means each formula unit contains 2 sodium ions (Na\^+).
Understand that the concentration of the solution (0.300 M) refers to the concentration of Na\_2SO\_4 formula units dissolved in the solution.
Since each formula unit produces 2 sodium ions, multiply the molarity of Na\_2SO\_4 by 2 to find the concentration of sodium ions.
Write the expression for sodium ion concentration: \(\text{[Na\^+]} = 2 \times 0.300\,M\).
Calculate the product to find the sodium ion concentration (do not compute the final value here, just set up the calculation).
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