### Dilution Problem - Find Initial Quantity

9. Altering Product Strength 9.1) Dilution 9.1.1) Dilution

9.1.1.1) Find initial concentration in dilution Easy 1

Total tried:       Correct:       Wrong:

What quantity of a 33.25% solution do you need to make 172.5 mL of a 2.7% solution?. Round to the nearest tenth. Click on the button below to see the answer and explanations

Notice: Undefined variable: input_value1 in /home/jshzub/web/rxcal.org/public_html/practice/practice/includes/body.php on line 220
lb equals 14 mL kg

This is a volume expansion or concentration dilution type problem. The essential formula is Q_1C_1 = Q_2C_2.
Here,

Q_1 = initial quantity = ?\quadmL.
C_1 = initial concentration = 33.25%
Q_2 = final quantity = 172.5\quad mL.
C_2 = final concentration = 2.7\quad %

Therefore, by rearranging the formula, we get:
Q_1 = (Q_2×C_2)/(C_1) therefore Q_1 = (172.5 × 2.7) /33.25=14\quadmL in nearest tenth (Ans.).

#### 123 ,Lorem Ipsum dummy Text E-mail: [email protected]

Notice: Undefined index: TOTALTRY in /home/jshzub/web/rxcal.org/public_html/practice/practice/includes/body.php on line 675