1 34.
A 3.00-mol/L sodium phosphate solution, NaPO (aq), is used to make
250 mL of 0.50-mol/L sodium phosphate solution. It is determined
that 42 mL of the concentrated solution is needed for the dilution.
Steps that may be used to make the solution are as follows:
1. Insert a stopper into the volumetric flask.
2. Add distilled water to the volumetric flask until the 250-mL level is
reached.
3. Add 42 mL of the sodium phosphate solution to 500 mL of
distilled water.
4. Transfer 42 mL of the 3.00-mol/L solution into a 250-ml
volumetric flask.
5. Heat the solid sodium phosphate to change it into a liquid.
6. Invert the volumetric flask to mix the contents.
Which steps, in the proper order, are required to produce the
0.50-mol/L sodium phosphate solution?
A. 3, 5, 2,6
B. 4, 2, 1,6
C. 2, 3, 4, 6,5
D. 5, 2, 4, 1,6
ahloride