A 650 mL sodium bromide solution has a bromide ion concentration of 0.245 M.What is the mass (g)of sodium bromide in solution?
A)103
B)0.00155
C)16400
D)16.4
E)0.159

Question

Quizplus · Accepted Answer

To calculate the mass of sodium bromide in solution, we need to use the formula:

Mass = volume (in L) x concentration (in mol/L) x molar mass (in g/mol)

First, we need to convert the volume from mL to L:

650 mL = 0.65 L

Next, we can use the concentration given in the problem to calculate the number of moles of bromide ions:

0.245 mol/L x 0.65 L = 0.15925 mol

Since sodium bromide has a 1:1 ratio of sodium ions to bromide ions, the number of moles of sodium bromide in the solution is also 0.15925 mol.

Finally, we need to use the molar mass of sodium bromide to convert the number of moles to grams:

0.15925 mol x 102.89 g/mol = 16.4 g

Therefore, the answer is D) 16.4.

A 650 ML Sodium Bromide Solution Has a Bromide Ion