the concentration of a solution of potassium chloride. The concentration of a so

Question

the concentration of a solution of potassium chloride. The concentration of a solution equals the mass 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 cyläinder says: ·she put some solid potassium chloride into the graduated cylinder and weighed it with the potassium chloride added, the cylinder weighed 8897 . She added water to the g. graduated cyinder 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 14.6 ml What concentration shouid the student write down in her lab notebook? Be sure your answer has the correct number of significant digits Type nere to search

Explanation / Answer

Concentration of the solution=

Mass of solute/ volume of the solution

Conc.=( 88.971g - 6.25g)/14.6ml

=5.66582192 g/ml

The original (5.66582192) had 9 significant digits and a least significant decimal of -8.

The new format (5.666) has 4 significant digits and a least significant decimal of -3.

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