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WorksheetsChemical Reactions and Equations _LS_2
Total questions: 34
Worksheet time: 17mins
Aluminium + Copper chloride Aluminium chloride + Copper
Ca(OH)2+CO2 → CaCO3 + H2O
2Al(s)+3CuCl2(aq) → 2AlCl3(aq)+3Cu(s)
2Mg(s) + O2(g) → 2MgO(s)
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) ↑
Ca(OH)2 + ……….—–> CaC03 + H20
NaOH +....... Na2S04 + H20
2NaOH + H2SO4
-----> Na2S04 + 2H2O
NaOH( aq) + HCl(aq) → NaCl(aq) + H2O( l)
2NaOH + CO2 → Na2CO3 + H2O
2Al( s) + 6NaOH(aq) → 3H2(g) + 2Na3AlO3(aq)
Ca(OH)2 +.... CaC03 + H20
Ca(OH)2 + CO2 CaCO3 + H2O
Ca + 2H2O → Ca(OH)2+H2
Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O.
Ca3 (PO4)2 (aq) + H3PO4 (aq) → Ca(H2PO4)2 (aq)
Complete the sentence.
During a chemical reaction, atoms ________.
can appear
can disappear
get rearranged
stop moving and vibrating
What is the Law of Conservation of Mass?
It states that matter cannot be created or destroyed.
It states that energy cannot be created or destroyed.
It states that matter can be created or destroyed.
It states that sound can be created or destroyed.
Correct and balance the following equations:
Ca + __H20 ----> Ca(OH)2 + H2
1
2
4
3
Correct and balance the following equations:
Ca + 2H20 ----> Ca(OH)__ + H2
1
2
4
3
Correct and balance the following equations:
N__ + 3H2 ----> 2NH3
1
2
4
3
Correct and balance the following equations:
N2 + ___H2 ----> 2NH3
1
2
4
3
Correct and balance the following equations:
N2 + 3H2 ----> __NH3
1
2
4
3
Write the complete balanced chemical equation by predicting the products, writing the formulas correctly and balancing the equation:
(a) Calcium hydroxide + Carbon dioxide ----> Calcium carbonate + Water
Write the complete balanced chemical equation by predicting the products, writing the formulas correctly and balancing the equation:
Aluminium + Copper chloride ——– > Aluminium chloride + Copper
Write the complete balanced chemical equation by predicting the products, writing the formulas correctly and balancing the equation:
(b) Sulphur dioxide (gas)+ Oxygen (gas) -----> Sulphur trioxide (gas)
2S02 (g) + 02 (g) ----> (a) (g)
Na +O2 ------>Na2O
What is the number of Sodium atoms on the left (Reactant side)
1
2
Na +O2 ------>Na2O
What is the number of Oxygen atoms on the left (Reactant side)
1
2
Na +O2 ------>Na2O
What is the number of Oxygen atoms on the right (product side)
1
2
Na +O2 ------>Na2O
What is the number of Sodium atoms on the right (product side)
1
2
In the equation
Na +O2 ------>Na2O
Which element will be balance first
Sodium
Oxygen
In the equation
Na +O2 ------>Na2O
To balance Oxygen, We we will multiple 2 on product side, so the product side will appear as:
2Na2O
Na2o2
In the equation
Na +O2 ------>Na2O
On multiply the product side by 2 what is the number of sodium atoms
2Na20
4
1
2
3
In the equation
Na +O2 ------>Na2O
On multiply the product side by 2 to get 2Na2, what will multiple the sodium on the reactant side (left side ) with?
4
1
2
3
How to Balance H2O2 = O2 + H2O: Decomposition of Hydrogen Peroxide. What is the number of Hydrogen atoms on the reactant side"
1
2
3
4
How to Balance H2O2 = O2 + H2O: Decomposition of Hydrogen Peroxide. What is the number of Hydrogen atoms on the reactant side"
1
2
3
4
How to Balance H2O2 = O2 + H2O: Decomposition of Hydrogen Peroxide. What is the number of Hydrogen atoms on the product side"
1
2
3
4
How to Balance H2O2 = O2 + H2O: Decomposition of Hydrogen Peroxide. What is the number of Oxygen atoms on the product side
1+1 =2
2+1 =3
3+1 =4
4+1 =5
How to Balance: H2O = H2 + O2 (Decomposition of Water) How many atoms of Hydrogen are present on the reactant side (Left side) of the equation?
1
2
3
4
How to Balance: H2O = H2 + O2 (Decomposition of Water) How many atoms of Oxygen are present on the reactant side (left side) of the equation?
1
2
3
4
How to Balance: H2O = H2 + O2 (Decomposition of Water) How many atoms of Hydrogen are present on the product side (right side) of the equation?
1
2
3
4
How to Balance: H2O = H2 + O2 (Decomposition of Water) How many atoms of Oxygen are present on the product side (right side) of the equation?
1
2
3
4
How to Balance: H2O = H2 + O2 (Decomposition of Water) Which element is not balanced in the equation?
Hydrogen
Oxygen
How to Balance: H2O = H2 + O2 (Decomposition of Water) Which side will you multiply 2 with first?
Left side/Reactant side
Right side/Product side
How to Balance: H2O = H2 + O2 (Decomposition of Water) Which element will you multiply 2 with on the right side?
Oxygen
Hydrogen
Calcium hydroxide + Carbon dioxide ——– > Calcium carbonate + Water
