a chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide…

a chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. the concentration of a solution equals the mass of whats dissolved divided by the total volume of the solution.\nheres how the student prepared the solution:\n- the label on the graduated cylinder says: empty weight: 6.20 g\n- she put some solid sodium hydroxide into the graduated cylinder and weighed it. with the sodium hydroxide added, the cylinder weighed 23.5 g.\n- she added water to the graduated cylinder and dissolved the sodium hydroxide completely. then she read the total volume of the solution from the markings on the graduated cylinder. the total volume of the solution was 164.12 ml.\nwhat concentration should the student write down in her lab notebook? be sure your answer has the correct number of significant digits.\n g ml^(-1)

a chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. the concentration of a solution equals the mass of whats dissolved divided by the total volume of the solution.\nheres how the student prepared the solution:\n- the label on the graduated cylinder says: empty weight: 6.20 g\n- she put some solid sodium hydroxide into the graduated cylinder and weighed it. with the sodium hydroxide added, the cylinder weighed 23.5 g.\n- she added water to the graduated cylinder and dissolved the sodium hydroxide completely. then she read the total volume of the solution from the markings on the graduated cylinder. the total volume of the solution was 164.12 ml.\nwhat concentration should the student write down in her lab notebook? be sure your answer has the correct number of significant digits.\n g ml^(-1)

Answer

Explanation:

Step1: Calculate mass of sodium hydroxide

Mass of sodium hydroxide = Mass of cylinder with NaOH - Empty - weight of cylinder. So, $m = 23.5\ g- 6.20\ g=17.3\ g$.

Step2: Calculate concentration

Concentration $C=\frac{\text{Mass of solute}}{\text{Volume of solution}}$. Given volume $V = 164.12\ mL$. Then $C=\frac{17.3\ g}{164.12\ mL}\approx0.105\ g\cdot mL^{-1}$.

Answer:

$0.105\ g\cdot mL^{-1}$