Energy Changes in Chemistry Flashcards
1
Q
Observations for burning magnesium
A
- grey solid burns with bright white light
- white ash is formed
2
Q
Observations for heating hydrated CuSO4
A
- blue crystals turn white
- steam/ condensation/ colourless liquid forms
3
Q
Observations for adding water to anhydrous CuSO4
A
- white powder turns blue
- heat is released
4
Q
Observations for NaOH solution and FeCl2 solution
A
- green precipitate forms
5
Q
Observations for CuCO3 and H2SO4
A
- bubbles/ fizzing
- green solid disappears
- blue solution is formed
- heat is released
6
Q
Observations for Mg and CuSO4 solution
A
- grey solid disappears
- blue solution fades
7
Q
What type of reaction is burning magnesium?
A
- burning/ combustion
- oxidation
8
Q
What type of reaction is heating hydrated CuSO4?
A
- exothermic
- dehydration
9
Q
What type of reaction is adding water to anhydrous CuSO4?
A
- hydration
- exothermic
10
Q
What type of reaction is NaOH solution and FeCl2 solution?
A
- precipitation
11
Q
What type of reaction is CuCO3 and H2SO4
A
- neutralisation
- exothermic
12
Q
What type of reaction is Mg and CuSO4 solution
A
- exothermic
- displacement
13
Q
Chemical reactions can be recognised by…
A
- temperature change 🌡️
- colour change 🔵➡️🟣
- gas production 💨
- precipitation formed 🧊
14
Q
Precipitation
A
the formation of a solid in a solution during a chemical reaction
15
Q
Exothermic
A
- gives out heat 🥵
- temperature rises/ increases ⬆️🌡️
