Question

An experiment in chm 2045 requires students to prepare a 1.0 m aqueous solution of potassium phosphate. Jennifer fills a 1.0 liter volumetric flask to the calibration line with water. She then weighs out 212.3 g of potassium phosphate and adds it to the volumetric flask. Joe weighs out 212.3 g of potassium phosphate and adds it to a 1.0 liter volumetric flask. He then fills the volumetric flask to the calibration line with water. Which student has correctly prepared a 1.0 m aqueous solution of potassium phosphate?

Answer 1

Option C. Joe

Step-by-step explanation:

To prepare 1 M potassium phosphate, K3PO4, do the following:

Step 1:

Determine mass of K3PO4 needed. In this case, 212.3g of K3PO4 is needed.

Step 2:

weigh out 212.3g from the K3PO4 sample using a weighing balance.

Step 3:

Put the weighed 212.3g of K3PO4 into a 1 L volumetric flask and fill with water to the mark.

The solution produced is 1 M K3PO4.

From the above illustrations and considering the question given above, only Joe made the right preparation of 1 M aqueous solution of K3PO4.

Answer 2

Joe

Step-by-step explanation:

The procedure for preparing a standard solution of a solid is that the solid is accurately weighed in a balance, carefully transferred to the specified volumetric flask and then made up to mark with distilled water.