Can you add two concentrations

Remeber that the number of moles of solute does not change when more solvent is added to the solution. Concentration, however, does change with the added amount of solvent. Don't forget this concept. You will use it again in acid-base equilibrium.

How do you prepare ml of 0. There are two solutions involved in this problem. Notice that you are given two concentrations, but only one volume. Solution 1 is the one for which you have only concentration - the solution that is already sitting on the shelf. Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law?

For example, if you mix ml of a 10 percent concentration of compound A with ml of a 20 percent concentration of the same compound, a mathematical formula involving the initial concentrations of the two solutions, as well as the volume of the final solution, allows you to work out the final concentration in percent of the volume of the new combined solution.

Determine the volume of each concentrated substance used in the experiment, by converting the concentration percentage to a decimal i. Solve the above formula for x , which is the percentage concentration of the final solution.

You can use any units you wish for the concentration values and volumes, so long as you use the same units for each of the two solutions. Concentration can also be expressed by percent composition by mass, mole fraction, molarity, molality or normality. For example, work out the percent composition by mass of a g salt solution containing 20 g salt by dividing the mass of the concentration by the total mass of the solute, then multiplying it by If you have ANY other ratio not you must use the following formula:.

To get moles you must use molarity for the concentration and liters as the volume. If you use milliliters mL for volume you will get millimoles mmol for the amount. Be careful and note which type unit you are using.