General Chemistry Lab
What color does lithium emit?
deep red
Most pipettes are built to _______ a known volume of liquid
deliver
What color does sodium emit?
yellow
What are the standard ways to make a solution of known concentration? (Select all that apply.)
-Dissolve a weighed amount (known mass) of solid into a known volume of liquid. -Dilute a known volume of stock solution into a known volume of liquid.
When working with a Bunsen burner, which of the following precautions must be observed?
-Flammable liquids should never be heated with a Bunsen burner.The area above the burner must be clear before it is lit. -The burner must never be left unattended. The area near the burner should be clear of paper and other flammables. -The substance being heated should never be pointed at people. -If the flame blows out, the gas must be turned off, because gas could accumulate and an explosion could occur.
What should be done to waste solutions containing copper ion? (Select all that apply.)
-It should be dumped in a beaker labeled "waste copper" on ones bench during the experiment. -It should be disposed of in the bottle for waste copper ion when work is completed.
In the flame test experiment, you will be working with two types of hazard. Which are they?
-open flame -hydrochloric acid, corrosive solution
What clothing is appropriate for the laboratory?
-shoes that cover heels and toes -shirt and pants that overlap 6" -pants that extend to the ankles -a shirt that covers the shoulders (has sleeves)
Volumes obtained with volumetric flasks, pipettes, and burets are recorded to the nearest ____ mL
0.01
Twisting the sleeve to open the holes (baffles) above the base of the burner does which of the following?
Allows more air (oxygen) into the flame.
What actions should you take if you spill copper(II) sulfate solution on yourself?
Flush the affected area with water.
Which hazards are associated with copper(II) sulfate?
Irritant and toxic
If one spills hydrochloric acid on one's hands, what is the FIRST thing one should do?
Rinse them in running water.
What color does barium emit?
Yellow green
What color does strontium emit?
bright red
Volumetric flasks are built_______ known volume of liquid
contain
What color does copper (II) emit?
green
What color does calcium emit?
orange red
What color does potassium emit?
pale violet
