Check up Chapter 2

• Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 3

Check up Chapter 2

What is a chemical reaction?

1. Reaction of a chemistry teacher
2. a reaction between substances
3. A reaction where reactants permanently change into new products
4. A reaction with oxygen

What happens with the atoms during a chemical reaction?

1. They disappear and new ones are being formed
2. They are being rearranged into new molecules
3. They change in mass
4. They just disappear

When we heat sugar the products we get are a black substance and a colorless liquid. Is this chemical reaction?

1. Yes, because new substances appear.
2. Yes, because in heating there is always a chemical reaction
3. No, because new substances appear.
4. No, because in heating there is never a chemical reaction

Explain what the difference is between a phase change and a chemical reaction.

Is this a chemical
reaction?

1. Yes
2. No

Is this a chemical reaction?

1. Yes
2. No

1 reactant --> 2 or more products

Organical substance(s) --> Carbon(s) + water(l) + white smoke(g)

Fuel + oxygen(g) --> burningproducts

Combustion reaction

Decomposition reaction

Thermal decomposition reaction

Connect names with atoms

Oxygen

Zinc

Carbon

Silver

Mercury

Hg

Ag

C

Zn

O

Connect symbol with names

Cu

H

Ba

N

Pb

Lead

Nitrogen

Barium

Hydrogen

Copper

A combustion is a reaction that involves:

1. Oxygen
2. Nitrogen
3. Carbondioxide
4. Fire

What is necessary for a combustion?

1. Fuel, heat, water
2. Fuel, heat, carbondioxide
3. Fuel, ignition temperature, oxygen
4. Burned fuel, ignition temperature, oxygen

What is taken away in this fire?

1. Fuel
2. Oxygen
3. Ignition temperature

What happens a decomposition reaction?

1. from 1 reactant you get 2 or more products
2. 2 mixtures are going to react together
3. Sorting substances from a mixture
4. splitting elements

Is a decomposition reaction a chemical reaction?

1. yes, new substances are being made
2. Yes, substances disappear
3. No, it is a separation method
4. No, it is a phase change

De 3 types of decomposition are:

1. electrolysis, analysis, hydrolysis
2. thermolysis, electrolysis, photolysis
3. photolysis, thermolysis, hydrolysis
4. thermolysis, lightolysis, electrolysis

Drag the correct words to the type of decomposition reaction

Photolysis

Electrolysis

Thermolysis

Heat

Light

Electricity

Water decomposes under influence of electrical energy.
Name the type of decomposition reaction

1. Thermolysis
2. Combustion
3. Electrolysis
4. Photolysis

What substance can't be decomposed

1. Water
2. Iron
3. Sugar
4. Carbondioxide

Is NO₂ decomposable?

1. Yes
2. No

Drag the decomposable substance(s) to the target in the middle

decomposable

A year ago, Bianca bought creme/white curtains that matched perfectly with the white walls. However a year later the curtains turned yellow. What type of decomposition reaction was responsible for the color change?

1. Electrolysis
2. Photolysis
3. Thermolysis
4. Combustion

Decomposition reaction

Combustion reaction

How many of each kind of atom do I have?

3 H₂SO₄

Give the reaction equation and indicate phase:

Solid Iron can react with the gas Iodine. The product is solid Iron iodide (FeI).

Give the reaction equation and indicate phase:

Aluminium and Oxygen are produced from the compound Aluminium Oxide ( )

Al​2​​O​3​​

Balance the equation

....H​2​​O+....F​2​​→....HF+....O​2​​

1. 1 - 1 - 2 - 1
2. 2 - 2 - 2 - 1
3. 2 - 2 - 4 - 2
4. 2 - 2 - 4 - 1

Balance the equation

....Mg​3​​N​2​​(s)+....H​2​​O(l)→....MgO(s)+....NH​3​​(l)

1. 1 - 3 - 3 - 2
2. 2 - 6 - 6 - 4
3. 1 - 2 - 2 - 3
4. 1 - 6 - 3 - 2

Balance the equation

C​6​​H​14​​O+?O​2​​⟶6CO​2​​+7H​2​​O

1. 12
2. 9
3. 18
4. 19

Give the balanced reaction equation

Sodiumazide (NaN3) decomposes in Sodium and Nitrogen.

Give the balanced reaction equation

The combustion of Phosphorus results into Diphosphorus-pentaoxide

What is a reagens?

1. a chemical reaction that doesn't take part in a reaction
2. a chemical reaction that takes part in a reaction

white coppersulphate is a reagens for ..

1. Carbondioxide
2. Carbonmonoxide
3. Hydrogen
4. Water

Hoe ging deze toets?

010

Wat vind je nog lastig en zou in de les herhaald moeten worden?

DONE!!!