Question

Calculate the percent concentration of 100ml of isopropyl in a 250 ml Solution?

Answer 1

Answer:

what the hell is this question

Answer 2

Answer:

We know that 70% of the volume is isopropyl alcohol:

To prepare the solution, enough water is added to 175 mL isopropyl alcohol to form 250 mL solution.:

Because the density of liquids changes slightly as the temperature changes, a concentration given in percent by mass is accurate over a wider range of temperatures than is a concentration given in percent by volume. Sometimes a combination of mass and volume is used to express the concentration--the mass of solute dissolved in each 100 mL solution. Using this method, a 5% (wt/vol) solution of sodium chloride contains 5 g sodium chloride in each 100 mL solution.