1. Make the new product 2. Look at the charges on the table to determine if subscripts are needed.
3. If needed, use coefficients to balance out the reaction
a. Always check for diatoms elements in decomposition and single replacement reactions
b. The list of the diatomics are at the end of this document.

18. A synthesis reaction of Aluminum and Sulfur
Al + S à

19. The decomposition of Potassium oxide
Li2Oà

20. The combustion of propane gas
C3H8 + O2à

21. A single replacement reaction of Potassium metal and Silver chloride.
K + AgCl à

22. A double replacement reaction of Sodium sulfate and Potassium iodide
Na2SO4 + KI à

Ion Charges table
+1 ions +2 ions +3 ions -1 ions -2 ions
Na Mg Al I O
Li Ca Cl S
KSO4
Ag

List of Diatomic Elements
O2
Cl2
H2
Br2
N2
I2

F2

18

Explanation:

because I did this test and I hot it wrong and this is right

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.