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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. Al (s) +3KOH  Al(OH) 3 + 3K. Charades. I will need 4 volunteers!. Endothermic vs Exothermic.

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Write a balanced formula for
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
Charades

I will need 4 volunteers!


Endothermic vs exothermic
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.



    Extra credit 2 pt balance
    Extra Credit 2 ptbalance:

    SF4 + I2O5 IF5 + SO2


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