Title Decomposition Reactions Intro Task Can you remember
Title: Decomposition Reactions Intro Task Can you remember the formula for: -Water -Carbon Dioxide - Calcium Carbonate Question What happens in a decomposition reaction?
LO: Describe what limestone is some of its uses Grade C/D: Describe what limestone is and what some its used to make Grade B: Explain how limestone can undergo thermal decomposition reactions and write an equation for it Grade A/A*: Suggest word and symbol equations for other metal carbonates when they undergo thermal decomposition
Limestone!! • It is a sedimentary rock • It was formed mainly from sea shells • It is the compound called calcium carbonate • It is a useful raw material It has the chemical formula of: Ca. CO 3
Task 1: You have got a set of questions relating to today’s lesson! Questions are on Canvas! Task 2: Draw a picture of what today’s experiment is going to look like Label your diagram with these words: - Lime Water - Delivery Tube - Metal Carbonate - Clamp - Bunsen Burner – Test tube
Limestone thermally decomposes Thermal decomposition means ‘break down’ using heat! Calcium carbonate Calcium oxide + Carbon dioxide Sometimes called quick lime! We test for carbon dioxide using lime water! Lime water is normally clear! It turns cloudy with CO 2
Other metals decompose too, you’re going to see which one decomposes the most. 1. 2. 3. 4. Set up your equipment like the picture Make sure your boiling tube is at an angle Heat up the metal carbonate for 3 minutes Give the lime water a ‘cloudy’ rating out of 10 after the 3 minutes is up Metal carbonate Lime water cloudy rating /10 Calcium carbonate Magnesium Carbonate Copper carbonate 5. Write a conclusion in your book- which metal thermally decomposed the fastest. (This will be the one whose lime water was the most cloudy)
We need to describe what happened in our experiment using word and symbol equations. . . Grade C: Write a word equation for thermally decomposition reaction of calcium carbonate Grade B: Write a symbol equation for this reaction Grade A: Write word equations for the other metal carbonates Grade A*: Write symbol equations for the other metal carbonates Hint: Any metal carbonate is just the symbol for the metal with ‘CO 3’ on the end. Any metal oxide is just the symbol for the metal with ‘O’ on the end.
LO: Describe what limestone is some of its uses Grade C/D: Describe what limestone is and what some its used to make Grade B: Explain how limestone can undergo thermal decomposition reactions and write an equation for it Grade A/A*: Suggest word and symbol equations for other metal carbonates when they undergo thermal decomposition
What’s the odd picture out? Explain which picture in 1 sentence in your book!!
Metal carbonate Lime water cloudy rating /10 Metal carbonate Calcium carbonate Magnesium Carbonate Copper carbonate Metal carbonate Lime water cloudy rating /10 Metal carbonate Calcium carbonate Magnesium Carbonate Copper carbonate Lime water cloudy rating /10
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