COMPLETE THE REACTION BY WRITING BALANCED CHEMICAL EQUATION:
1. Pb(NO)3 → ________ + ___________+ _________
2. CaO + H2O → __________ + HEAT
3. FeCl3 + NH4OH → _______+ ________
4. AgNO3 + Cu → _________+ _________
5. MgO + H2O → ________
6. H2S + Cl2 → ________ + ________
7. NaOH + H2SO4 → ________+ ________
8. Na2CO3 + CuSO4 → __________+_______
9. CuCO3 → _______ + ________
10. CaCO3 + HCl → _______+ ________+ _________
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_________
2. CaO + H2O → __________ + HEAT
3. FeCl3 + NH4OH → _______+ ________
4. AgNO3 + Cu → _________+ _________
5. MgO + H2O → ________
6. H2S + Cl2 → ________ + ________
7. NaOH + H2SO4 → ________+ ________
8. Na2CO3 + CuSO4 → __________+_______
9. CuCO3 → _______ + ________
10. CaCO3 + HCl → _______+ ________+ _________
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A chemical equation is the symbolic representation of a chemical reaction.
- The equation is also called a word equation.
- The symbols of the reactants and products are always the same.
- A chemical equation shows the changes of reactants to the product by an arrow (→) placed between them.
- On the LHS of an arrow, reactants are written and on the RHS products are written in the chemical equation.
The chemical equation can be made more informative by applying symbols :
- Solid - (s)
- Liquid - (l)
- Gases - (g)
- Aqueous solution - (aq)
- Reactants which produce gas in reaction - (↑)
- Reactants which produce solid in reaction - (↓)
A balanced chemical equation is that in which the total number of atoms of each element is equal on both side of the equation.
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