CHEM 1212 MIDTERM
1. formula for density
Answer Density=mass(g)/mL
2. density of 4.13g and 3.83mL
Answer 1.08115g/mL= 1.08g/mL
3. density of 3.29mL and 2.89g
Answer 0.90577508g/mL= 0.906g/mL
4. MgSO4(s) disappears when added to water(ℓ) and stirred.
What describes the relationship between MgSO4 and water?
Answer soluble
5. solubility
Answer ability of a solid or gas to dissolve in a liquid
6. solvent
Answer solution that does the dissolving
,7. solute
Answer substance that is being dissolved
8. miscible
Answer when two liquids mix completely together
9. immiscible
Answer when two liquids do not completely mix together
10. How would the value of density for water be affected if the mass of the water
was recorded as 5.71 g instead of 5.17 g for a volume of 5.22 mL? (Will it be
higher, lower, or no effect?) Explain your answer.
Answer The density would be higher since you are using a larger mass
11. Rubbing alcohol is miscible with water and has a density of 0.785 g/mL. Olive
oil is immiscible with alcohol and has a density of 0.92 g/mL. Water's density
is 1 g/ml What will happen when water is added to a beaker, then the olive oil,
and then rubbing alcohol?
Answer Water would sink to the bottom, the olive oil will be in the middle, and the alcohol will float on
,top
12. Rubbing alcohol is miscible with water and has a density of 0.785 g/mL. Olive
oil is immiscible with alcohol and has a density of 0.92 g/mL. What will happen
if the layers are stirred and then allowed to settle.
Answer The rubbing alcohol will mix completely with the water and form the bottom layer, while the olive
oil will float on top
13. What will result when liquid W (density = 0.75 g/mL), liquid S (density = 0.65
g/mL, immiscible with liquid W), and liquid T (density = 0.85 g/mL, miscible with
liquid W and immiscible with liquid S) are poured into test tube?Answer Two layers
will form in the test tube. The top layer is liquid S and the bottom layer is a mixture of liquid W&T.
14. Identify the reaction type for the generic reaction given.
A + B ’ABAnswer Combination
15. Identify the reaction type for the generic reaction given.
AC + B ’A + BCAnswer Single Displacement
, 16. Identify the reaction type for the generic reaction given.
AC + BD ’AD + BC
Answer Double Displacement
17. Identify the reaction type for the generic reaction given.
A + B ’A^+n + B^-m
Answer Oxidation reduction
18. Identify the reaction type for the generic reaction given.
ABC ’AB + C
Answer Decomposition
19. Identify the reaction type for the generic reaction given.
2 Mg(s) + O2(g) ’2 MgO(s)
Answer combination
20. Identify the reaction type for the generic reaction given.
CaCO3(s) ’CaO(s) + CO2(g)
Answer Decomposition
1. formula for density
Answer Density=mass(g)/mL
2. density of 4.13g and 3.83mL
Answer 1.08115g/mL= 1.08g/mL
3. density of 3.29mL and 2.89g
Answer 0.90577508g/mL= 0.906g/mL
4. MgSO4(s) disappears when added to water(ℓ) and stirred.
What describes the relationship between MgSO4 and water?
Answer soluble
5. solubility
Answer ability of a solid or gas to dissolve in a liquid
6. solvent
Answer solution that does the dissolving
,7. solute
Answer substance that is being dissolved
8. miscible
Answer when two liquids mix completely together
9. immiscible
Answer when two liquids do not completely mix together
10. How would the value of density for water be affected if the mass of the water
was recorded as 5.71 g instead of 5.17 g for a volume of 5.22 mL? (Will it be
higher, lower, or no effect?) Explain your answer.
Answer The density would be higher since you are using a larger mass
11. Rubbing alcohol is miscible with water and has a density of 0.785 g/mL. Olive
oil is immiscible with alcohol and has a density of 0.92 g/mL. Water's density
is 1 g/ml What will happen when water is added to a beaker, then the olive oil,
and then rubbing alcohol?
Answer Water would sink to the bottom, the olive oil will be in the middle, and the alcohol will float on
,top
12. Rubbing alcohol is miscible with water and has a density of 0.785 g/mL. Olive
oil is immiscible with alcohol and has a density of 0.92 g/mL. What will happen
if the layers are stirred and then allowed to settle.
Answer The rubbing alcohol will mix completely with the water and form the bottom layer, while the olive
oil will float on top
13. What will result when liquid W (density = 0.75 g/mL), liquid S (density = 0.65
g/mL, immiscible with liquid W), and liquid T (density = 0.85 g/mL, miscible with
liquid W and immiscible with liquid S) are poured into test tube?Answer Two layers
will form in the test tube. The top layer is liquid S and the bottom layer is a mixture of liquid W&T.
14. Identify the reaction type for the generic reaction given.
A + B ’ABAnswer Combination
15. Identify the reaction type for the generic reaction given.
AC + B ’A + BCAnswer Single Displacement
, 16. Identify the reaction type for the generic reaction given.
AC + BD ’AD + BC
Answer Double Displacement
17. Identify the reaction type for the generic reaction given.
A + B ’A^+n + B^-m
Answer Oxidation reduction
18. Identify the reaction type for the generic reaction given.
ABC ’AB + C
Answer Decomposition
19. Identify the reaction type for the generic reaction given.
2 Mg(s) + O2(g) ’2 MgO(s)
Answer combination
20. Identify the reaction type for the generic reaction given.
CaCO3(s) ’CaO(s) + CO2(g)
Answer Decomposition
