3. Observation of burning match or splint What caused the change in the burning

Question

3. Observation of burning match or splint What caused the change in the burning match or splint? 5. Type of reaction: F. Hydrogen Peroxide Reactants 1. Appearance of 2. Evidence of a Chemical Reactants(oxOOO Oxion Reaction 4. Type of chemical reaction: Questions and Problems 01 What evidence of a chemical reaction might you see in the following cases? Refer to Table 1. n kstansonueood and Coz is racasod IS b. bleaching a stain e. burning a match d. rusting of an iron nail 02 Balance the following equations:

Explanation / Answer

3. The friction between the match box and the stick converted to heat energy and this heat energy triggered the burning of the red phosphorous in the match stick.

4. 1 Na2CO3 + 2HCl ------> 2 NaCl + H2O + CO2

5. Type of chemical reaction is Neutralisation reaction.

F:

3. 2 H2O2(aq) ---KI---->2 H2O(l) + O2(g)

4. Type of chemical reaction is decomposition reaction.

Q1: Burning a match lit: the fire we see is the evidence.

rusting of an iron nail, the powdery rust is the iron oxide formed by the reaction between the iron metal and the atmospheric oxygen.

Q2:a) Mg + 2HCl ----->H2 + MgCl2

b) 4Al + 3O2 -----> 2Al2O3

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