C1.1/2 - Chemical Equations
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What do Symbol equation show
• helps you see how much of each substance is involved in the reaction • includes formulas that cannot be changed (H2O)
In any chemical reaction
• a new substance created and atoms are rearranged
Law of conservation of mass is
• no mass is created or destroyed • Total mass of reactants = total mass of products
State symbols
• tell us what state each element is at room temperature • s = Solid • l = liquid • g = gas • Aq = aqueous solutions (dissolved in water)
Balancing equations
• same amount of atoms on either side • must be balanced to prove law of conservation • when balancing the number goes in front of compound, changing all elements in the compound • can’t change formulas