a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on t

Question

a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on the amount a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on the amount a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on the amount a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on the amount a combustion reaction occurs when oxygen reacts with hydrocarbon. depending on the amount EXPERIMENT 6 POSTLAB EXERCISE Name In the following reactions, what product(s) indicate that a reaction has occurred and why did you pick that particular product? 1. 2KCIO, (s)--> 02 (g) + 2 KCl (s) 2. Pb(NOs): (a)+2 HCI (aq)>PbCl: (s) +2 HNO 3. HNO, (ag) + NaOH (a)HO)+ NaNOs (aq) 4 H SO (aq)+ BaCI: (a)2 HCI (aq)+BaSOs (s) Koro. (aq) + Ba(NO)2 (aq)--> BaCro. (s) + 2 KNO3 (aq) 6. AgNO, (aq)+ NaCI (a)AgCI(s)+ NaNO, (aq) 7. 2 C Ho (g) +702 (g)4CO2 (g)+6 H:0 (g) Zn (s) + H2SO4 (aq)- Znso. (aq) + H3(g) 9. 2 Mg (s) +0: (g)>2 MgO (g) 97

Explanation / Answer

Q1

decrease in mass / bubble of gas generation

Q2

soldi formation of PbCl2

Q3

increase in temperature due to neutralization

pH neutralized, i.e. pH = 7

Q4

Precipitate formation of BaSO4(s)

Q5

solid formation , BaCrO4(s)

Q6

Agcl(s) formation

Q7

Heat generation

Q8

solid dissolves, also gas bubble forms

Q9

Mg goes from metallic to oxide; increase in "solid" mass

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