Multiple Choice
Which of the following correctly converts a concentration of 25 millimolar (mM) to molar (M)?
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6. Chemical Quantities & Aqueous Reactions
Dilutions
Multiple Choice
If 880 mL of water is added to 125.0 mL of a 0.770 M HBrO4 solution what is the resulting molarity?
A
0.096 M
B
0.136 M
C
0.257 M
D
0.892 M
E
1.76 M
Verified step by step guidance1
Calculate the initial moles of HBrO4 using the formula: \( \text{moles} = \text{molarity} \times \text{volume} \). Convert the volume from mL to L by dividing by 1000.
Determine the total volume of the solution after adding water by adding the initial volume of the HBrO4 solution to the volume of water added. Convert both volumes to liters before adding.
Use the formula for molarity: \( M = \frac{\text{moles of solute}}{\text{total volume of solution in liters}} \) to find the new molarity of the solution.
Substitute the calculated moles of HBrO4 and the total volume of the solution into the molarity formula.
Solve the equation to find the resulting molarity of the solution after dilution.
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