Question

(2) Zn (3) Pb (4) CU - Ag 6. On the basis of the reactions observed in the six test tubes, explain why the position of hydrogen cannot be fixed exactly with respect to all of the other elements listed in the activity series in Question 5. 7. What additional tests) would be needed to establish the exact position of hydrogen in the activity series of the elements listed in Question 5? 8. On the basis of the evidence developed in this experiment: (a) Would silver react with dilute sulfuric acid? Why or why not? (b) Would magnesium react with dilute sulfuric acid? Why or why not? - 108 -

Answer 1

lowest Q4 In an ackoity series, the metals are arranged 1. borsed on their reactivity from highest to and from highest to lowest their activity decreases, tendency to loose electron decades Jout Hydrogen has only one electrom in its Orbital so it can do bolo lose and accept One election easily Therefore the position of Hydrogen cannot be fired on the basis of reactions obserund in the six telt tubes Q7 What additional team would loc needed to establish - the cract position of hydrogen in the activity series of the elements Mg. Zn, Pb, cu & Ag. fine the position of hydrogen on a reactivity Series - can be determined by its ability to displace - Orygen from the anide of the metal concerned 4 hydrogen is made reactive than a metal , it will displace oxygen from the Metal oxide. Anst The position from hydrogen in a reactionty, series can be determined by the ability of the metal to displace hydrogen from the acids - Mg 2 Displace hydrogen vigorously an from acids Pb } Displace hydrogen from only hot and concentrated acids Cu? Does not displace hydrogen from Ag J acids at all therefore the between position of hydrogen is in - Pb & Cu according to as therefore series will let go 1213 RPC) Ag + H2SO4 (dil) x (no seaction) silver does not react with dilute sulphuric acid, because it is least reactive metal to produce hydrogen by reacting with sulphuric acid (also hydrogen in reactivity series is above the silver) 6) Mg + Hg Soy (dil) Mgsoy +H ₂ .. Yes, Mg will react with dilute sulphuric acid because Mg is above in the activity series from hydrogen 2 Mg is fairly enough reactive S Scanned With F cama CamScanner