AcidBaseTitrationLab

AcidBaseTitrationLab - until the solution turns red and...

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Titration of sodium hydroxide from http://www.chemsoc.org/networks/learnnet/Word_files/Kev1-10.doc with hydrochloric acid Introduction In this experiment sodium hydroxide is neutralized with hydrochloric acid to produce the soluble salt sodium chloride. This is then concentrated and crystallized in a crystallizing dish. What to record What was done and what was observed. What to do 1. Add 25 cm 3 of sodium hydroxide solution ( Corrosive ) to a conical flask using a measuring cylinder and add a couple of drops of methyl orange indicator. 2. Fill the burette with hydrochloric acid and run through to the zero mark (use a funnel to fill the burette and a beaker to collect the excess acid). 3. Add the hydrochloric acid to the sodium hydroxide solution in small volumes swirling after each addition. Continue
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Unformatted text preview: until the solution turns red and record this reading on the burette. 4. Carefully add this volume of fresh hydrochloric acid to another 25 cm 3 of sodium hydroxide solution to produce a neutral solution. 5. Reduce to about half the volume using an evaporating dish on a gauze over a Bunsen burner flame. 6. Leave to evaporate in a crystallizing dish to produce a white crystalline solid. Safety Wear eye protection. Questions 1. What is the everyday name for sodium chloride? 2. This reaction is a specific example of the general reaction: Acid + alkali → salt + water. Write a word equation for this specific reaction. 3. Write a formula equation for this reaction. 4. Why must you use another 25 cm 3 of sodium hydroxide solution to make pure sodium chloride? Home...
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AcidBaseTitrationLab - until the solution turns red and...

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