PETER A.
VANDER ZNADER
BETET-NS 1A
Activity no.7 Types
Types of Chemical Reactions
Table no. 1
Symbol/Formulas of Reactants Observations
1. b. S(s) + O2(g) The glass rod was placed in the water which stick
the sulfur ,then ignite about a gram of sulfur
powder with the aid of glass rod
c. 2S(s) + 3O2(g) And dissolve the fume in 5ml water then shake
well the test with litmus paper, to conclude
nothings happen still the same, when litmus paper
place inside the 5ml water with sulfur.
2. KClO3 The potassium chloride was placed in the test tube
and heated, during heating the glowing splinter
inserted in the upper end of the test tube. When
the smoke enter the test tube that’s when the
chemical reaction happen which produced KClO3
KCl + O2
3. Zn + HCI A piece of zinc metal was placed into 2ml of 6m
HCl the after a seconds the reaction started which
first the metal react to the HCl caused become
blurry then a few seconds it another reaction
happened which it started to bubbling, after a
minute a flame splinter was placed into the mouth
of test tube then it cause a small bang sound then
it bubbles vigorously.
4. Ba(NO3)2 + Na2SO4 1M barium nitrate solution was placed in to the
test tube then was added of 2ml of 1M sodium
sulfate solution the result was Barium nitrate and
sodium sulfate react together which change the
color into blurry solution and when I search it I
form soluble salt.
5. Na2SO4 + CuCO4 1M copper sulfate (II) solution was placed in one
test tube then 1M sodium sulfate was placed in
another 5ml test tube and its test tube was
dropped a staple wire, based on what I observed
no reaction is happening. Then after 1 minute the
staple wires was removed. To compared, the
staple wire in copper (II) sulfate solution was
become red like a rusty one and the staple wire in
the sodium sulfate solution was stay the same.
6. HCl + CaCO3 0.5g of calcium carbonate was placed in the test
tube then added 5ml of 6M HCI solution then
rapidly reaction happens it bubbling for a seconds.
7.CuSO4 0.5g copper (II) sulfate was placed in the dry test
tube then heated, when its heated the
appearance of the upper part test tube was
become foggy, and the copper (II) sulfate slowly
turned white.
8. CaO A gram of a dry calcium oxide was placed in a test
tube and added 10ml water the stir the solution
then red and blue litmus paper placed into the
solution, after blue litmus turns red in acid red
litmus was turned blue in basis.
Table 2
Balance equation Type of Reaction
1. a. 2 S + 3 O2 2 SO3 synthesis
b. 2S + 3O2 2 SO3 synthesis
2. 2 KClO3 2 KCl + 3 O2 decomposition
3. Zn + 2 HCl ZnCl2 + H Single Displacement
4. Ba(NO3)2 + Na2SO4 BaSO4 + Na2(NO3)2 Double displacement
5. Na2SO4 + 2CuSO4 2NaSO4 + Cu2SO4 Double displacement
6. 2 HCl + CaCO3 CaCl2 + H2O + CO2 decomposition
7. CuSO4+5H2O CuSO4 + 5 H2O synthesis
8. CaO + H2O = Ca(OH)2 synthesis
Questions:
1. Complete and balance the equation and give the type of reaction.
Balance equation Type of Reaction
a. Mg + 2 AgNO3 Mg (NO3)2 + 2 Ag a.Single Displacement
b. N2 + 3 H2 2 NH3 b. synthesis
c. Na2O + H2O 2 NaOH c. synthesis
d. AgNO3 + NaCl AgCl + NaNO3 d. Double displacement
e. 2 HgO 2 Hg + O2 e. Decomposition
f. 3Zn + 2NiCl3 3ZnCl2 + 2Ni f. Single Displacement
g. 3NH4NO3 + Na3PO4 (NH4)3PO4 + 3NaNO3 g. Double displacement
h. MgCO3 MgO + CO2 h. decomposition
i. 2 Fe (OH) 3 + 3 H2SO4 Fe2 (SO4)3 + 6 H2O i. Double displacement
j. 2Li + Cl2 2LiCl j. synthesis
2. Why must equation be balanced?
Chemical reactions follow the law of conservation of mass. Chemical equations show this conservation,
or equality, in terms of atoms. The same number of atoms of each element must appear on both sides
of a chemical equation. However, simply writing down the chemical formulas of reactants and products
does not always result in equal numbers of atoms. You have to balance the equation to make the
number of atoms equal on each side of an equation.
