Multiple Choice
95 g of ClO_2 is dissolved in water to prepare a 0.25 M solution. What is the final volume of the solution in liters?
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6. Chemical Quantities & Aqueous Reactions
Molarity
Multiple Choice
How many millimoles (mmol) of KOH are present in 33.4 mL of 0.500 M KOH solution?
A
16.7 mmol
B
8.35 mmol
C
0.167 mmol
D
1.67 mmol
Verified step by step guidance1
Identify the given information: volume of KOH solution = 33.4 mL, molarity (M) of KOH = 0.500 M.
Convert the volume from milliliters to liters because molarity is expressed in moles per liter. Use the conversion: \(\text{Volume (L)} = \frac{\text{Volume (mL)}}{1000}\).
Use the molarity definition to find moles of KOH: \(\text{Moles of KOH} = \text{Molarity} \times \text{Volume (L)}\).
Convert moles of KOH to millimoles by multiplying by 1000, since 1 mole = 1000 millimoles: \(\text{Millimoles} = \text{Moles} \times 1000\).
Combine all steps into one expression to calculate millimoles of KOH: \(\text{Millimoles} = 0.500 \times \frac{33.4}{1000} \times 1000\).
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