A type of glass vessel used for mixing and measuring approximate volumes. The accuracy is about 10%.
What is a beaker?
100
The charge on a proton.
What is positive?
100
pH measures this .....
What is the hydrogen ion concentration?
100
A laboratory solution is made using 25 milligrams of sodium fluoride (NaF) dissolved in 1-liter volumetric flask filled to the mark. What is the mg/L concentration of the solution?
What is 25 mg/L?
200
All work done in the lab that has the potential to generate hazardous vapors or gases should be performed in this location.
What is under the fume hood?
200
Pressure cooker used to sterilize glassware, bottles, membrane filter equip, culture media and contaminated material to be discarded.
What is an autoclave?
200
The first inner shell of all atoms (the only shell for hydrogen and helium) can hold _____ electrons.
What is 2?
200
The pH scale ranges from ____ to _____.
What is 0 to 14?
200
200 mL of 5N NaOH is diluted to 1000 mL. Calculate the new normality of the solution.
What is 1N?
300
If a chemical is splashed on the skin or in the eyes, this is the minimum time the area should be flushed with water.
What is 15 minutes?
300
This type of glassware is the most accurate way to measure volume. It's disadvantage is that it can measure only one volume, it should not be used for storing or heating solutions.
What is a volumetric flask?
300
The electrons in the outermost energy level of an atom that are involved in chemical reactions.
What are valence electrons?
300
A ph of 4 is ____ times as acidic as a pH of 5.
What is 10 times?
300
25 pounds of a chemical is added to 100 pounds of water. Calculate the % strength by weight.
What is 20%?
400
List three types of information found in a chemical's MSDS.
What are common/chemical name, manufactureer, spill leak procedures , hazardous ingredients, physical data, fire and explosive data, ppe, special precautions
400
A closed container that heated weighing or drying dishes are placed to cool in a dry environment. It contains a substance, such as anhydrous calcium sulfate, which absorbs moisture and keeps the relative humidity near zero so that the dish or sample will not gain weight from absorbed moisture.
What is a dessicator?
400
Elements on the far right of the periodic table which exist typically as gases or liquids and are poor conductors of electricity.
What are non-metals?
400
The minimum number of buffers required to calibrate a pH meter.
What is 2, but 3 is better?
400
You are given 100 mL of 3N HCl. Calculate the number of mL of water required to make 0.5N HCl.
What is 500 ml?
500
This is a type of toxin that can cause problems in a developing fetus. Pregnant women should avoid working with these chemicals.
What is a teratogen?
500
The operating temperature and pressure for an autoclave.
What is 121 C at 15 psi?
500
The noble gases have this many valence electrons.
What is 8 or 2?
500
pH meters must be calibrated at least this often.
What is daily (or per shift) ?
500
You are given 10 mL of 15N H2SO4. Calculate the amount of water (in mL) required to make 0.4N H2SO4.