a) To 3 mL of potassium chromate solution in a test tube add five drops of 3M sulfu- ric acid. Shake the mixture. Observe and record any change. Add sodium hy- droxide solution drop wise until a change is observed. Record observation. Add more drops of sulfuric acid. Interpret the observed changes. Was the reaction complete? 72 Can the reaction be reversed? Write the equation for the reaction.

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Chapter1: Chemical Foundations
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a) To 3 mL of potassium chromate solution in a test tube add five drops of 3M sulfu-
ric acid. Shake the mixture. Observe and record any change. Add sodium hy-
droxide solution drop wise until a change is observed. Record observation. Add
more drops of sulfuric acid. Interpret the observed changes.
Was the reaction complete?
72
Can the reaction be reversed?
Write the equation for the reaction.
b) To 1 mL of antimony trichloride solution in a test tube add sufficient water to form
a precipitate. What is the precipitate formed? Add 6M hydrochloric acid drop by
drop until the precipitate dissolves. Add more water.
Was the reaction complete?
Can the reaction be reversed?
Write the equation for the reaction.
c) Place 50 mL of water into a 100-mL beaker and add 5 mL of 0.1M ferric chloride.
Acidify the solution with 5 drops 6M hydrochloric acid. Add 5 mL of ammonium
thiocyanate solution to the mixture.
What is the purpose of hydrochloric acid? Explain.
Write the equation for the reaction involved.
Transcribed Image Text:a) To 3 mL of potassium chromate solution in a test tube add five drops of 3M sulfu- ric acid. Shake the mixture. Observe and record any change. Add sodium hy- droxide solution drop wise until a change is observed. Record observation. Add more drops of sulfuric acid. Interpret the observed changes. Was the reaction complete? 72 Can the reaction be reversed? Write the equation for the reaction. b) To 1 mL of antimony trichloride solution in a test tube add sufficient water to form a precipitate. What is the precipitate formed? Add 6M hydrochloric acid drop by drop until the precipitate dissolves. Add more water. Was the reaction complete? Can the reaction be reversed? Write the equation for the reaction. c) Place 50 mL of water into a 100-mL beaker and add 5 mL of 0.1M ferric chloride. Acidify the solution with 5 drops 6M hydrochloric acid. Add 5 mL of ammonium thiocyanate solution to the mixture. What is the purpose of hydrochloric acid? Explain. Write the equation for the reaction involved.
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