Lab Exam 3: D,E,FG,H

Question 1

Definite Proportions

Answer 1

A chemical compound always contains exactly the same proportion of elements by mass.

Question 2

Inorganic Forms of Copper

Answer 2

• 3 Acid-Base Reactions
• 3 Redox Reactions
• 1 Decomposition Reaction
• 3 Precipitation Reactions
• 4 Double Displacement Reactions

Question 3

Vacuum Filtration

Answer 3

• Separating a solid product from a solvent or liquid reaction mixture
• Poured through a filter paper in a Buchner funnel
• Much faster than gravity filtration and is suitable when the solid particles to be filtered are sufficiently large so as not to pass through or around the filter paper.

Question 4

Triple Beam & Centigram Balances

Answer 4

-Used for precise measurements

Question 5

Lead

Answer 5

• Toxic heavy metal

- 12ppm5

Question 6

ICP-MS Instrument

Answer 6

• Inductively Coupled Plasma Mass Spectrometer

- Analogous to weighing individual atoms

Question 7

Electron and Molecular Geometries/Predict Polarity/Angles

Answer 7

Geometry of compound/Determine if Molecule is Polar/Bond Angles

Question 8

Bonding Groups: 2

Lone Pairs: 0

Answer 8

Electron Geometry: Linear
Molecular Geometry: Linear
Bond Angles: 180

Question 9

1) CO2

Answer 9

1) Molecule: Not Polar, But Bonds Are Polar

Question 10

BG: 3
LP: 0

Answer 10

EG: Trigonal Planar
MG: Trigonal Planar
BA: 120

Question 11

1) BF3

Answer 11

1) Molecule: Not Polar, But Bonds Are Polar