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chem pre lab quiz

QuestionAnswer
What are the following reaction types you need to consider? combination reactions, decomposition reactions, single-replacement reactions, double-replacement reactions, and combustion reactions.
What are the three goals? Observe chemical reactions of different reaction types. Classify chemical reactions according to type. Write balanced chemical equations for each reaction.
Two safety procedures are: use safety goggles and avoid contact with Hydrochloric acid as it is corrosive.
How much do you fill a small test tube with Copper (II) sulfate solution Halfhill a small test tube with this solution (COpper II sulfate solution)
What else do you add to the tube half fill of Copper II sulfate solution Add about 2 g iron fillings to the solution, and record your observation after 5 minutes
What are the solutions? Iron metal and copper(II) sulfate solution, Lead(II) nitrate and potassium iodide solutions, Magnesium metal and hydrochloric acid, Action of heat on hydrogen peroxide, Action of electricity on water (electrolysis), and heat on sodium hydrogen carbonate
What else do you add to the Lead (II) nitrate solution? Add 5-10 drops of potassium iodide solution.
What do you do with the hydrochloric acid? Half-fill a medium-sized test tube with 6M hydrochloric acid. Place the test tube in a test-tube rack and add several magnesium turnings.
What do you identify after you put into the HCl and the magnesium turnings? Identify any gas that forms by using crucible tongs to hold a burning wood splint at the mouth of the test tube.
What do you do with the hydrogen peroxide? Add 2 mL of the 3% hydrogen peroxide solution to a medium-sized test tube.
What do you do with the medium size tube after you add the hydrogen peroxide? Clamp the test tube to a ring stand. Make sure that the mouth of the tube is pointed away from you and away from everyone else. Heat the solution very gently.
How do you identify the gas (occurs multiple times in the experiment) Identify any gas that forms by using crucible tongs to insert a glowing wood splint into the mouth of the test tube.
What is the process of breaking down water into its component elements by passing electricity through it. This process is called electrolysis
What do you do with the Solid sodium hydrogen carbonate? The solid sodium hydrogen carbonate will be heated in a large test tube for 2 minutes.
How will the gas given off by the heated sodium hydrogen carbonate? Tested by exposing it to a burning splint and bubbling it through limewater. Record your observations of this.
There is also another solution called lime water and calcium. What is lime water used for? Use to bubble the sodium hydrogen carbonate through while exposing it to a burning splint.
TEacher uses what for the water? Apparatus for electrolysis.
Created by: Masterlearner5
 

 



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