Qualitative Analysis Makeup PEP

Based on the following solubility table which of the following compounds is insoluble.

• NaNO₃

• K₂C₂O₄

• BaSO₄

• CaCrO₄

Where do the test tubes go when you are done with this experiment?

• In the regular trash can

• In the glass disposal

• Cleaned and re-used

• Placed back on the lab bench for next student to use.

Which of the following images does not show a balanced centrifuge configuration?

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• 
• 
• 

Which of the following are physical hazards in for this lab?

• Hot glass looks like cold glass and can cause burns.

• Opening or touching a spinning centrifuge can cause jammed or broken fingers.

• Hydrochloric acid can cause irritation to the lungs upon inhalation.

• Chipped or broken glass can cause cuts.

• Potassium chromate causes irritation when in contact with exposed skin.

In a double replacement reaction between potassium chromate (K₂CrO₄) and lead (II) nitrate (Pb(NO₃)₂) which of the following compounds would form a precipitate?

• KNO₃

• K₂CrO₄

• PbCrO₄

• Pb(NO₃)₂

In Part A of this lab ____ or ____ could be identified. In Part B of this lab ____ or ____ could be identified. (Separated answers with commas and write the name of each cation)

What should you do if you’re in the middle of your experiment and your goggles keep fogging?

Is it every acceptable to adjust your goggles with gloved hands?

• Yes

• No

• It depends

Explain what qualitative analysis means