Question

now that you know how to calculate concentration, lets practice this skill a bit before you return to your work on the flint water system. lets take a look at fluoride. fluoride is an element that is added to many municipal water supplies, usually as sodium fluoride or naf. adding fluoride to water actually helps prevent tooth decay and cavities. however, adding too much fluoride to a citys water supply may be harmful, damaging ones bones and joints. lets examine a sample of fluoride being prepared in a lab. what is the molarity of this sample? m

Explanation:

Step1: Convert volume to liters

Since \(1\ L = 1000\ mL\), then \(V=500\ mL=\frac{500}{1000}L = 0.5L\)

Step2: Use molarity formula

The formula for molarity \(M=\frac{n}{V}\), where \(n = 2.3\ mol\) (moles of solute) and \(V = 0.5L\) (volume of solution). So \(M=\frac{2.3\ mol}{0.5L}\)

$$M = 4.6\ M$$

Answer:

\(4.6\)