Solutions & Solubility Solution Preparation. Solution Preparation from a solid  Standard Solution = a solution for which the precise concentration is.

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Presentation transcript:

Solutions & Solubility Solution Preparation

Solution Preparation from a solid  Standard Solution = a solution for which the precise concentration is known  Used in research laboratories and industrial processes  Used in chemical analysis and precise control of chemical reactions

 Equipment needed to prepare a standard solution:  Electronic balance  Volumetric flask Solution Preparation

Volumetric Flask

Example  For an acid-base titration, you need to prepare 250 mL of a 0.50 mol/L sodium hydroxide solution

Step 1  Calculate the number of moles of solute needed.

Step 2  Calculate the mass of solute needed.

Step 3: The Experimental Procedure Preparing a solution from a solid

Experimental Procedure  Weigh out the required mass of sodium hydroxide in a clean beaker.  Dissolve the solid in a small amount of distilled water in the volumetric flask  Add distilled water to the flask until the volume mark is reached  Stopper the flask and mix the contents thoroughly by repeatedly inverting the flask.

Now you try…  Prepare 100.0mL of 0.300M solution of sodium chloride.