Michelle carries out the test on zinc and lead. Justin carries out the test on copper
and aluminium, Michelle uses dilute hydrochloric acid and Justin uses very dilute
sulfuric acid for his tests.
Michelle's investigation
0.5M
НСІ
very dilute acid
bubbles
very dilute acid
bubbles
lead
zinc
Justin's investigation
dilute acid
dilute acid
0.1M
H2S04
bubbles
aluminium
copper
3 Explain why Michelle and Justin cannot use their observations to decide if
copper or aluminium are more or less reactive than zinc and lead.
Answers: 2
Chemistry, 22.06.2019 14:30
Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.
Answers: 3
Chemistry, 22.06.2019 16:00
As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
Answers: 2
Chemistry, 22.06.2019 16:50
Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.
Answers: 3
Michelle carries out the test on zinc and lead. Justin carries out the test on copper
and aluminium...
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