Question

experiment 12 single displacement reaction

NAME SECTION DATE INSTRUCTOR REPORT FOR EXPERIMENT 12 Single Displacement Reactions Evidence of Reaction Describe any evidence of reaction; if no reac- tion was observed, write "None". Equation (to be completed) Write "No reaction", if no reaction was observed. Ca + AgNO (aq) — Pb + Cu(NO)(aq) Zn + Pb(NO, Maq) — Zn + MgSO (aq) Cu + H2SO4aq) Zn + H2SO,(aq) - QUESTIONS AND PROBLEMS 1. Complete the following table by writing the symbols of the two elements whose reactiv. ities are being compared in each test: Tube Number 2 5 6 Greater activity Lesser activity 2. Arrange Pb, Mg, and Zn in order of their activities, listing the most active first. - 107 -

Answer 1

Single Displacement Reaction 1 cu + 2Ag Noz (ac) - 2. pb + Cu(NO3)₂(an) Zn + Pb(NO3)₂ Zn + Mg so a (a) cu f H₂SO4 (aas Zn + H2SO4 (aan 1. Questions & Cu(NO3)2 + 2Ag to Pb(NO3)2 + cut Zn (NO3)2 + Pbt no reaction. no reaction. Zn504 + 2 Problem I Tube Number : Ipb Zn Greater activity Leaser activity / Ag cu РЬ Zn cu 2. Most active between pb, mg & Zn is to uit 1 mg (magnesium) most active] (2) Zn (tme) but (3) Pb (lead) 3. Most active between cu, Ag, Zn is 1 Zn (zime) [most active ] (2) cu (Copper) (3) Ag (Silver) 4. Most active between 10 mg, H & Ag 1 mg (magnesium] [most active] (2) 32 H (hydrogen) Ag ssinen) e till

Arranging the metals in activity Series - (1) mg (magnesium) most beactive ? Do it 13) Pb head) 14) eu (copper) (5) Ag (silver) 6 on the basis of reactions obeered in the six test tubes the position of hydrogen cannot be fixed. This is becausse from the Six reactions we see that it is more active than Coppen only and coppen is more active than Ag, we canna Say that wheather it is more active the mg, nor Lead so the exact position of er hydrogen is not be fixed. 6 To fix the exact position of hydrogen in the activity Series, the given sets of reactions are not enough. We need to test with lead in dinte sulfuric acid. If lead replaces hydrogen from dinite sulfuric and then we can say that hydrogen is most less reactive than lead. As the last reaction shows that En is active than hydrogen , hence the arestion remains only bar Load. The reaction goes like this pb & Hisoa (any Pbsoa + H₂ ? & On the basis of the evidence @ Silver does not react with dinte sulfuric arida because from the reactions we see that Ag is the least active metal. Its activity is lessen than Copper (an). A cu cannot replace Hydrogen, it is predictable that siver also doesnot react with Sulfuric aid. Magnesium dues reacts with dinite sulfuric and (Issoa dl.) anesium is the most active metal in because magnesium is the most active metal the given series. Its activity lies far ahed of hydrogen, hence it can

replace hydrogen from Sulfuric acid