Multiple Choice
What is the molarity of an AlBr₃ solution if 150.0 mL of the solution contains 250.0 mg of Br⁻ ion?
6. Chemical Quantities & Aqueous Reactions
Molarity
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What is the molarity of Cl⁻ in a 0.220 M NaCl solution?
A
0.110 M
B
0.330 M
C
0.220 M
D
0.440 M
Verified step by step guidance1
Understand that molarity (M) is a measure of the concentration of a solute in a solution, expressed as moles of solute per liter of solution.
Recognize that NaCl dissociates completely in water into Na⁺ and Cl⁻ ions. The chemical equation for this dissociation is: NaCl → Na⁺ + Cl⁻.
Since NaCl dissociates in a 1:1 ratio, each mole of NaCl produces one mole of Cl⁻ ions.
Given that the molarity of the NaCl solution is 0.220 M, this means there are 0.220 moles of NaCl per liter of solution.
Therefore, the molarity of Cl⁻ ions in the solution is also 0.220 M, as each mole of NaCl yields one mole of Cl⁻.
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