Question

solution of potassium chloride. The concentration of a solution equals the mass A chemistry student must write down in her lab notebook the concentration of of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 3.250 g • She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 29.91 g. . She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 147.1 ml. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits.

Answer 1

- Weight of ker = (cylinder tke) - Cempty cylinder) = 29.91-325 - 26.668 NOTES: Concentration = mass volume - 26.668 = 0. 1819 mL 147.1 ML