AP Chemistry : Laboratory Equipment and Procedure
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Example Questions
Example Question #1 : Laboratory Equipment
While conducting an experiment, you need to measure exactly 
Graduated cylinder
Mohr pipette
A volumetric pipette is made to dispense a specific amount of liquid very accurately. The Mohr pipette, beaker, and graduate cylinder will not measure a specific amount of liquid as accurately as the volumetric pipette.
Example Question #47 : Laboratory Techniques And Analysis
While conducting an experiment, you are required to measure out exactly 
Erlenmeyer flask
Triple beam balance
Centigram balance
Analytical balance
Analytical balance
Potassium hydrogen phthalate is a solid at room temperature, so we can use a balance and a weigh boat or weigh paper. When measuring precise amounts of chemicals, an analytical balance will be able to provide the most accurate reading of mass.
Example Question #48 : Laboratory Techniques And Analysis
For an experiment, you are required to heat a sample of a solid to very high temperatures. What piece of laboratory equipment should you use to heat the solid?
Crucible
Beaker
Erlenmeyer flask
Test tube
Crucible
When you need to heat anything up to high temperatures, you must use a crucible. Glassware is not able to withstand as much heat as a crucible.
Example Question #49 : Laboratory Techniques And Analysis
An experiment requires you to mix a solution of 
A volumetric pipet
A graduated cylinder
A buret
A beaker
A beaker
A beaker is the best choice for mixing these two solutions. Graduated cylinders, burets, and pipets are all used to measure specific amounts of solution. Also, stirbars can be easily added to beakers to facilitate the reaction.
Example Question #50 : Laboratory Techniques And Analysis
You are required to find the absorbance of a specific solution. What piece of equipment should you use?
Spectrophotometer
Analytical balance
Chromatography paper
Litmus paper
Spectrophotometer
A spectrophotometer should be used because it is used to measure absorbance at specific wavelengths. An analytical balance is used for measuring mass. Chromatography paper is used to separate different pigments found in a chemical. Litmus paper is used to determine the pH of a substance.
Example Question #11 : Laboratory Equipment And Procedure
Your lab partner is asking you how to properly label a solution of HCl. Which label did you show him?
100mL of hydrochloric acid
Concentrated HCl
1M of acid
HCl
1M Hydrochloric Acid
1M Hydrochloric Acid
When you label chemical solutions, you should technically always use the full chemical name (though this is not always done). Using common abbreviations, like HCl for hydrochloric acid, is generally acceptable.
The reason why none of the other answers work is because they did not quantify how strong (concentrated) the HCl solution was. A 1 molar HCl solution is handled much differently than a 12 molar one. Even though the answer choice "1M of acid" did quantify the concentration, it did not say which acid was in solution, which would be very unsafe if someone else saw your beaker and needed to know how to dispose of the contents.
Labels should always provide information on the contents of the container, as well as its concentration strength.
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