Dilution Problem - Find final concentration after adding known amount of solvent

9. Altering Product Strength 9.1) Dilution 9.1.1) Dilution Find initial concentration in dilution Easy 1

Total tried:       Correct:       Wrong:

If 287.5 ml of solvent is added into 44.5 mL of a 22.25 % solution, then calculate the new concentration.

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 2.98 % kg

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

    `Q_1` = initial quantity = `44.5\quadmL`.
    `C_1` = initial concentration = `22.25\quad%`
    `Q_2` = final quantity = `44.5\quad mL+287.5\quadmL=332\quad mL`.
    `C_2` = final concentration = `?\quad %`

    Therefore, rearranging the formula, we get:
    `C_2 = (Q_1 × C_1)/(Q_2)` `therefore C_2 = (44.5 × 22.25) /332=2.98\quad %` (Ans.).

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