G9 Important chemical reactions
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- Slide
IMPORTANT
CHEMICAL REACTIONS
TO LEARN. - Slide
1. Reaction of Lithium with
oxygenLithium reacts with oxygen to produce
lithium oxide.4Li + O2⭢ 2Li2O
- 3. Multiple-choice30 seconds1 pt
Q.What is the name of apparatus A?
answer choicesBeaker
Gas jar
Glass bottle
Deflagrating spoon
- 4. Multiple-choice30 seconds1 pt Q.
What is the name of apparatus B?
answer choicesDeflagrating spoon
Metal thing
Gas jar
- 5. Multiple-choice30 seconds1 ptQ.
Lithium reacts with oxygen to produce lithium oxide.
Name the reactant(s)
answer choiceslithium
oxygen
lithium and oxygen
lithium oxide
- 6. Fill-in-the-Blank1 minute1 ptQ.
What colour is the flame when lithium burns in oxygen
- 7. Multiple-choice30 seconds1 ptQ.
Lithium reacts with oxygen to form lithium oxide.
How do we prove that the product of this reaction is alkali (a base)
answer choicesAdd red litmus paper
- it will stay red
Add red litmus paper
- it will turn blue
Add blue litmus paper
- it will turn red
- Slide
1. Reaction of Lithium with
oxygenLithium reacts with oxygen to produce
lithium oxide.4Li + O2⭢ 2Li2O
Lithium has a Red flame
Lithium oxide is basic (turns red litmus paper blue)
- Slide
2. Reaction of Sodium with
oxygenSodium reacts with oxygen to produce
sodium oxide.4Na + O2⭢ 2Na2O
- 10. Fill-in-the-Blank1 minute1 ptQ.
Name the product formed when sodium reacts with oxygen.
- 11. Multiple-choice30 seconds1 ptQ.
Sodium reacts with oxygen to form sodium oxide.
What colour is the flame?
answer choicesyellow
purple
blue
- 12. Multiple-choice30 seconds1 ptQ.
Sodium oxide is a/an
answer choicesacid
base
- Slide
2. Reaction of Sodium with
oxygenSodium reacts with oxygen to produce
sodium oxide.4Na + O2⭢ 2Na2O
Sodium has an Orange/yellow flame
Sodium oxide is basic (turns red litmus paper
blue) - Slide
3. Reaction of Potassium
with oxygenPotassium reacts with oxygen to produce
potassium oxide. - 15. Fill-in-the-Blank1 minute1 ptQ.
Potassium reacts with oxygen.
Name the product formed.
- 16. Draw3 minutes1 ptQ.
Write a balanced chemical equation for potassium reacting with oxygen to form potassium oxide.
Background image - Slide
3. Reaction of Potassium
with oxygenPotassium reacts with oxygen to produce
potassium oxide.4K + O2⭢ 2K2O
Lithium has a Lilac flame
Potassium oxide is basic (turns red litmus paper blue)
- Slide
5. Reaction of Magnesium
with oxygenMagnesium reacts with oxygen to produce
magnesium oxide.2Mg + O2⭢ 2MgO
- 19. Draw3 minutes1 ptQ.
Give the chemical formula for magnesium oxide
Background image - 20. Multiple-choice30 seconds1 ptQ.
Which of these show the flame colour for the reaction of MAGNESIUM with oxygen?
answer choices - Slide
5. Reaction of Magnesium
with oxygenMagnesium reacts with oxygen to produce
magnesium oxide.2Mg + O2⭢ 2MgO
Magnesium has a BRIGHT white
flame. - Slide
4. Reaction of Iron with
oxygenIron reacts with oxygen to produce iron oxide.
4Fe + 3O2⭢ 2Fe2O3
- 23. Draw3 minutes1 ptQ.
Give the chemical formula for iron oxide
Background image - 24. Multiple-choice30 seconds1 ptQ.
Rust is
answer choicesIron(iii) oxide
Ironic
magnesium phosphate
- Slide
4. Reaction of Iron with
oxygenIron reacts with oxygen to produce iron oxide.
4Fe + 3O2⭢ 2Fe2O3
Iron has an orange-brown flame
Rust is Iron III oxide
The formation of rust (and preventing it) is important
- Slide
- 27. Multiple-choice30 seconds1 ptQ.
How can we test if hydrogen gas is produced from a reaction?
answer choicesBubble the gas through clear lime water - it will turn milky.
Use a flame - it will make a popping sound.
Use a glowing splint - it will spontaneously burst into flame
Take a guess and hope you're right
- Slide
6. Reaction of Lithium with
waterLithium reacts with water to produce
lithium hydroxide and hydrogen gas.2Li + 2H2O ⭢ 2LiOH + H2
Test for hydrogen gas – flame makes a popping sound
Lithium hydroxide is a base (turns red litmus paper blue)
- 29. Multiple-choice30 seconds1 ptQ.
What is/are the product(s) in the following reaction
Lithium reacts with water to form lithium hydroxide and hydrogen gas.
answer choicesLithium
Lithium and water
Lithium hydroxide
Hydrogen gas and lithium hydroxide
- 30. Draw3 minutes1 ptQ.
Write a balanced chemical equation for the reaction of lithium with water.
Background image - 31. Multiple-choice30 seconds1 ptQ.
Lithium hydroxide turns red litmus paper blue.
True or false:
Lithium hydroxide is an acid
answer choicesTrue
False
- Slide
7. Reaction of Sodium with water
Sodium reacts with water to produce sodium
hydroxide and hydrogen gas. - 33. Multiple-choice30 seconds1 ptQ.
What possible reactants can react together to form sodium hydroxide and water?
answer choicesSodium and acid
Sodium and water
Lithium and water.
- 34. Draw3 minutes1 ptQ.
Write the chemical formula for sodium hydroxide.
Background image - Slide
7. Reaction of Sodium with water
Sodium reacts with water to produce sodium
hydroxide and hydrogen gas.2Na + 2H2O ⭢ 2NaOH + H2
Test for hydrogen gas – flame makes a popping sound
Sodium hydroxide is a base (turns red litmus paper blue)
- Slide
8. Reaction of Potassium
with waterPotassium reacts with water to produce
Potassium hydroxide and hydrogen gas. - 37. Draw3 minutes1 ptQ.
Write a balanced chemical reaction for potassium reacting with water to form potassium hydroxide and a gas.
Background image - 38. Multiple-choice30 seconds1 ptQ.
We know that potassium hydroxide is a base because
answer choicesIt turns red litmus paper blue.
It turns blue litmus paper red.
We guess.
- Slide
8. Reaction of Potassium
with waterPotassium reacts with water to produce
Potassium hydroxide and hydrogen gas.2K + 2H2O ⭢ 2KOH + H2
Test for hydrogen gas – flame makes a popping sound
Potassium hydroxide is a base (turns red litmus paper blue)
