Recap chapter 7

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

What are we going to do today?

• Recap chapter 7
• Who will win this serie of questions?         
  

Chapter 7 quick review

The light is on,
so lemon juice must
contain:

1. charged particles
2. freely moving electrons
3. freely moving charged atoms
4. freely moving charged particles

When do metals conduct electricity?

1. solid and dissolved
2. solid and liquid
3. liquid and dissolved
4. never

Which particles are responsible for electrical conductivity in a liquid metal

1. positively charged metal atoms
2. negatively charged electrons
3. freely moving electrons
4. freely moving electrons en + charged metal atoms

Francium is a

1. precious metal
2. semi-precious metal
3. reactive metal
4. highly-reactive metal

When do salts conduct electricity?

1. solid and dissolved
2. solid and liquid
3. liquid and dissolved
4. never

This is the lattice of a

1. metal
2. salt
3. molecular substance

What is happening
here?

1. electrolysis
2. combustion
3. dissolving
4. evaporation

When do molecular substances conduct electricity?

1. solid and dissolved
2. solid and liquid
3. liquid and dissolved
4. never

Barium chloride (BaCl2) is dissolved in water. Choose the correct chemical equation.

1. BaCl(s) =>Ba+(aq)+Cl-(aq)
2. Ba+(aq)+Cl-(aq) =>BaCl(s)
3. BaCl2(s) =>Ba2+(aq)+2Cl-(aq)
4. Ba2+(aq)+2Cl-(aq) =>BaCl2(s)

Give the molecular
formula of:

The melting point of sodium chloride is 801 °C, explain why this is so high.

This lattice is of a

1. metal
2. salt
3. molecular substance

Where is the
covalency incorrect?

1. a
2. b
3. c

Does the following substance readily dissolve in water?

1. Yes
2. No

Does the following substance readily dissolve in water?

1. Yes
2. No

The same mass, which has the highest melting point?

1. butan-1-ol
2. diethyl ether

Bronze consists of 78% copper and 22% Zinc. Calculate the amount of copper in 22.5 kg bronze.

Which bond(s) is/are broken is ethanol is dissolved in water.

1. hydrogen bonds
2. ionic bonds
3. hydrogen bonds and Vanderwaals bonds
4. Vanderwaals bonds

What is the covalency of Se

1. 1
2. 2
3. 3
4. no covalency

What is the covalency of Sr

1. 1
2. 2
3. 3
4. no covalency

What kind of substance is C2H6

1. Metal
2. Salt
3. Molecular substance

What kind of substance is CaCO3

1. Metal
2. Salt
3. Molecular substance

What kind of substance is Kr

1. Metal
2. Salt
3. Molecular substance

What kind of substance is Hf

1. Metal
2. Salt
3. Molecular substance