Safety
If you do not understand a direction or part of a lab procedure, you should...
Ask the instructor before proceeding
How many sig figs?
3,406
4
What is the formula for density?
D = M / V
What is the piece of equipment labeled A?
Beaker
2.0 x 3.0 = ??
6.0 (2 sig figs)
What should you do if you get acid on your hands?
rinse with water
How many sig figs?
0.00456
3
What unit is used for Mass?
Grams (g)
What is the piece of equipment labeled B?
Crucible tongs
9.00 / 2.0 = ?
4.5 (2 sig figs)
In the lab, you should wear safety goggles when...
chemicals, heat, or glassware are used
How many sig figs?
0.450600
6
What is the density of an object with a mass of 10.0 grams and a volume of 20.0 mL?
10.0 g / 20.0 mL = 0.500 g/mL
What is the piece of equipment labeled C?
Ring clamp
11.28 - 1.021 = ?
10.26 (hundreths)
What safety precautions should you take when using an open flame in the lab? (3 things)
- tie back hair
- no loose clothing
- no open toed shoes
How many sig figs?
56,000
2
What is the mass of an object that has a volume of 5.0 mL and a density of 3.0 g/mL?
(3.0 g/mL) x (5.0 mL) = 15 g
What is the piece of equipment labeled D?
Erlenmeyer flask
6.96 + 8.4 = ?
15.4 (tenths)
When gathering glassware for an experiment you should...(3 things)
- Read all directions FIRST
- Examine all glassware for chips/cracks
-clean any dirty glassware
How many sig figs?
5.800 x 102
4
Using water displacement. what is the volume of an object given the following:
Initial = 12.0 mL
Final = 18.0 mL
Final - Initial
(18.0 mL) - (12.0 mL) = 6.0 mL
Identify the parts of a Bunsen burner...
Barrel
Air valve
Gas valve
Gas inlet
Base
450 - 44 =
410 (tens)