The concentration of Br^- in a sample of seawater is 5.3 × 10^-4 M. If a liter of seawater has a mass of 1.0 kg, the concentration of Br^- is ________ ppm.

Question

Quizplus · Accepted Answer

To calculate the concentration in ppm, we need to multiply the molar concentration by the molar mass and then divide by the mass of the solution. The molar mass of Br^- can be calculated by adding up the atomic masses of each element: Br + S + P + S + P = 79.9 + 32.1 + 30.97 + 32.1 + 30.97 = 206.04 g/mol Multiplying the molar concentration by the molar mass: 5.3 × 10^-4 mol/L x 206.04 g/mol = 1.09332 g/L Dividing by the mass of the solution: 1.09332 g/L / 1000 g/L = 0.00109332 Finally, multiplying by 106 to convert to ppm: 0.00109332 x 106 = 42 ppm Therefore, the answer is B) 42.

The Concentration of Br- in a Sample of Seawater Is

The Concentration of Br^- in a Sample of Seawater Is