Answered

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An isopropyl alcohol contains 40 mL isopropyl and 60 mL water. What is their % by volume?​

Sagot :

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Answer:

We express a solution's volume by volume percent concentration,

% v/v

, by calculating how many milliliters of solute are present in

100 mL

of solution.

In essence, all you have to do to determine a solution's volume by volume percent concentration is figure out how many milliliters of solute you get in

100 mL

of solution, then tag along a

%

sign to that value.

In your case, you know that you get

18.9 mL

of isopropyl alcohol, your solute, in a total volume of

V

total

=

V

solute

+

V

solvent

V

total

=

18.9 mL

+

412 mL

=

430.9 mL

of solution. In order to find the solution's

% v/v

concentration, you must pick pick a

100 mL

of this solution and use its known composition to calculate how many milliliters of isopropyl alcohol it contains

Calculating Percent Volume/Volume (% v/v)

1.).A percent v/v solution is calculated by the following formula using the milliliter as the base measure of volume (v):

2.).% v/v = mL of solute/100 mL of solution

3.).X % = 5.0 mL HCl/100 mL of solution.

4.).X/100 = 5.0/100.

5.).100X = 500.

6.).X = 5.0% % v/v.

Explanation:

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