# Solving Dilution Problems

In other cases it may be inconvenient to weigh accurately a small enough mass of sample to prepare a small volume of a dilute solution.

In other cases it may be inconvenient to weigh accurately a small enough mass of sample to prepare a small volume of a dilute solution.

Usually this is done by evapourating or boiling, assuming that the heat of boiling does not affect the solute.

The dilution equation is used in these circumstances as well.

We are often concerned with how much solute is dissolved in a given amount of solution.

We will begin our discussion of solution concentration with two related and relative terms - dilute and concentrated.

The highly concentrated solution is typically referred to as the stock solution.

Example $$\Page Index$$: Diluting NITRIC ACID Nitric acid $$\left( \ce \right)$$ is a powerful and corrosive acid.

The aide is expected to use a syringe to draw up some stock solution and inject it into the waiting IV bag and dilute it to the proper concentration. Of course, the addition of the stock solution affects the total volume of the diluted solution, but the final concentration is likely close enough even for medical purposes.

Medical and pharmaceutical personnel are constantly dealing with dosages that require concentration measurements and dilutions.

A dilution is a solution made by adding more solvent to a more concentrated solution (stock solution), which reduces the concentration of the solute.

An example of a dilute solution is tap water, which is mostly water (solvent), with a small amount of dissolved minerals and gasses (solutes).

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• ###### Aliquot Calculations Basicmedical Key

To use this formula, fill in the desired quantities for Amount of drug desired, Amount of drug weighed, and Amount of dilution weighed. Then, solve for Total amount of dilution. In the foregoing example As with the previous example, remember that 720 mg is the total amount of the dilution i.e. drug plus diluent.…

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The problem gives us 3M of H 2 SO 4; Instead of asking for the molarity directly, the problem asks for the mass of H 2 SO 4 but we can get moles first! We know that the solution contains a 3M solution, so in 1 liter there would be 3 moles of H 2 SO 4; However, we don't have 1 liter, we have 400 mL which is.400 liters.…

• ###### Solving serial dilution problems - New Star Electrical Works.

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Practice dilution problems for the Bio 201 practical 1. You do a dilution by combining 100 ml volume of MgCl plus 700 ml unit volumes of RO water. What is the dilution factor, i.e, how many more times dilute is it than the original concentration?…

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• ###### Dilution Calculator - Molarity, Percent - PhysiologyWeb

Meant to be used in both the teaching and research laboratory, this calculator see below can be utilized to perform dilution calculations when working with molar or percent % solutions. See our Molar Solution Concentration Calculator for a definition of molarity and molar solutions.…