Question

Help filling in the blanks. Can someone just tell now how they did the first one and ill do the rest thanks

Answer 1

@sikinder

Answer 2

2.)7.5 ,2.5
3)9 , 1
4)8 ,2

Answer 3

are these correct?

Answer 4

@sheetalvee

Answer 5

im not sure, how did you get those ?

Answer 6

simple its dilution process

Answer 7

You dilute a solution whenever you add solvent to a solution. Adding solvent results in a solution of lower concentration. You can calculate the concentration of a solution following a dilution by applying this equation:

MiVi = MfVf

where M is molarity, V is volume, and the subscripts i and f refer to the initial and final values.

Example:
How many millilieters of 5.5 M NaOH are needed to prepare 300 mL of 1.2 M NaOH?

Solution:
5.5 M x V1 = 1.2 M x 0.3 L
V1 = 1.2 M x 0.3 L / 5.5 M
V1 = 0.065 L
V1 = 65 mL

So, to prepare the 1.2 M NaOH solution, you pour 65 mL of 5.5 M NaOH into your container and add water to get 300 mL final volume.

Answer 8

@sheetalvee

Answer 9

Thanks !