Identity the given reactions as Synthesis replacer 6) Cl2. LiBr LiCl + Br, 7) Ag

Question

Identity the given reactions as Synthesis replacer 6) Cl2. LiBr LiCl + Br, 7) AgNO3+ Cu Cu(NO3) 2 + Ag 8) C3H6O + O2 CO2 + H2O 9) CsHs + Fe--> Fe(CsHs) 2 10) (NH4)2Cr207 Cr203 +N2 + H2O .. Sodium carbonate reacts with lead (11) nitrate to produce sodium ni ead carbonate. Use your reference chart for proper formulas and Show all the work. a) 2) Complete the reaction equation and balance it. If 25 moles of sodium carbonate reacts with 35 moles of le is the limiting reagent? b) What is the number of moles the insoluble solid pro obtained? c)

Explanation / Answer

1) Na3P04 + KOH --> NaOH + K3P04

double replacement

2) double replacement

3) combustion

4) single replacement

5) combusiton

6) single replacement

7) single replacement

8) combustion

9) synthesis

10) decomposition

2)

a)

the reaction is

sodium carbonate + lead nitrate --> sodium nitrate + lead carbonte

the balanced reaction is

Na2C03 + Pb(N03)2 ---> PbC03 + 2NaN03

b)

from the balanced reaction

we can see that

moles of Pb(N03)2 required = moles of Na2C03 = 25

but

35 moles of Pb(N03)2 is present

so

Pb(N03)2 is in excess

and

Na2C03 is the limiting reagent

c) here the precipitate is lead carbonate

the reaction is

Na2C03 + Pb(N03)2 ---> PbC03 + 2NaN03

from the reaction

moles of PbC03 formed = moles of Na2C03 reacted = 25

so

25 moles of precipiate PbC03 is formed

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