Introduction to the Classes of Chemical Reactions

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Lab Report 5

Introduction to the
Classes of Chemical Reactions

Course: Chem. 1151L, Tuesday & Thursday
June 23, 2011
Mr. Nasir Uddin
Pre Lab Questions:

1.CaBr2 (aq) + K3PO4 (aq) → CA(PO4)2(S) + KBr (aq)
= Ca3(PO4)2 + 6 KBrDouble Replacement
2.Li(s) + O2(g) = Li2O(s) =2 Li2O Decomposition

3.CH4 + O2 = CO2 + H2O = CO2 + 2 H2OCombination

4.AgBr(s) = Ag (s) + Br2(l)= 2 Ag + Br2Combination

5.Mg(s) + H2SO4 (aq)= MgSO4 + H2Decomposition

Table Three: Formation of Salt via Double Replacement Reaction

0.1 KNO3* (NO3)2 0.1 M AgNO3
0.1M NaClTube 1: KNO3+NaClTube 3: Fe(NO3)3+NaClTube 5: AgNO3+NaCl PredictionNo change No changeNo change
Observation Change: Liquid is no longer fluidLiquid became lighterBubbles, carbon, color change, white separation 0.1M NaOHTube 2: KNO3+NaOHTube 4: Fe(NO3) 3+NaOHTube 6: AgNo3+NaOH Prediction No changeChangeChange

Observation No changeLiquid became dark brown orangeColor changed / brown / separation

Na2CO3 + HNO3 → NaNO3 + H2O + CO2

(Na2CO3 + HNO3)Liquid started to bubble – carbon dioxide

Procedure 3: Single Replacement Reactions

Table 1. Metals and the Reactivity Series; reaction with DI water.

Tube # & contentsName of MetalPrediction w/ DI H2OObservation 1.Control H2ONo metal addedPure water only
2.CuCopperNo changeNo change
3.FeIronNo changeColor change- 3 min
4.CaCalciumNo changeInstant, vigorous bubbles, boiling, warm 5.MgMagnesiumNo changeNo change

Table 2. Metals and the Reactivity Series; reaction with 6M HCI.

MetalsName of MetalPrediction w/ HCIObservation
6.Control HCLNo metal addedHCI only No change
7.CuCopperNo changeNo change
8.FeIronChangeBubbles / Iron dissolved 5 min.
9.CaCalciumNo changeInstant dissolve, bubbles, smell of gas, boiling 10.MgMagnesiumChangeBubbles appear instantly

Questions for Procedure2:

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