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Types of equations

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# Types of equations - PowerPoint PPT Presentation

Types of equations. Write a balanced formula for:. When solid aluminum reacts with an aqueous solution of potassium hydroxide, it forms aluminum hydroxide in solution and an potassium solid. Al (s) +3KOH  Al(OH) 3 + 3K. Charades. I will need 4 volunteers!. Endothermic vs Exothermic.

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### Types of equations

Write a balanced formula for:
• When solid aluminum reacts with an aqueous solution of potassium hydroxide, it forms aluminum hydroxide in solution and an potassium solid.
Charades

I will need 4 volunteers!

Endothermic vs Exothermic
• Endothermic rnx- take in heat energy (cooling)
• Energy as a reactant
• Exothermic rnx- these give off energy (hot rnx)
• Energy as a product
• Real life examples? ?
Decomposition-

2H2O2 (aq) 2H2O (l) + O2 (g)

To make this rnx go faster you would add MnO2 but it would not be a reactant.

This is called a Catalyst  helps the reaction go faster.

Single replacement

2AgNO3 (aq) + Cu (s) 2Ag (s) + Cu(NO3)2 (aq)

This rnx shows Ag switch with Cu ONLY.

• Double replacement

AgNO3 (aq) + KI (aq)  AgI (s) + KNO3 (aq)

This rnx shows the Ag and the K switch.

Synthesis
• 2Mg + O2  2MgO + light (energy)
Extra Credit 2 ptbalance:

SF4 + I2O5 IF5 + SO2