molar-solutions-liquids

molar-solutions-liquids - Making Molar Solutions From...

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Making Molar Solutions From Liquids (More accurately, from stock solutions)
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Making molar solutions from liquids Making molar solutions from liquids Not all compounds are in a solid form Acids are purchased as liquids (“stock solutions”). Yet, we still need a way to make molar solutions of these compounds. The Procedure is similar: Use pipette to measure moles (via volume) Use volumetric flask to measure volume Now we use the equation M 1 V 1 = M 2 V 2 1 is starting (concentrated conditions) 2 is ending (dilute conditions)
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Identify each volume to two decimal places (values tell you how much you have expelled) 4.48 - 4.50 4.86 - 4.87 5.00 Reading a pipette Reading a pipette
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Practice using a pipette Practice using a pipette Always keep pipette vertical To rinse: take up water, remove green filler, rotate pipette, replace filler, expel water If filler can not take up or expel enough liquid, remove, place finger over pipette, turn knob, replace filler. Take up water to 0 mark. Measure 3.2 mL into 10 mL cylinder. (one per person)
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molar-solutions-liquids - Making Molar Solutions From...

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