June 2018 NY Regents Chemistry Exam 49 Which metal reacts spontaneously with Sr2+ions? (1) Ca(s) (2) Co(s) (3) Cs(s) (4) Cu(s) Solution:...

June 2018 NY Regents Chemistry Exam 48 Given the balanced ionic equation representing a reaction: Cu(s) + 2Ag+(aq) → Cu^2+(aq) + 2Ag(s)...

June 2018 NY Regents Chemistry Exam 47 Which equation represents a reduction half- reaction? (1) Fe→Fe^3+ + 3e– (2) Fe+3e- →Fe^3+ (3)...

June 2018 NY Regents Chemistry Exam 46 Given the balanced equation representing a reaction: Ni(s) + 2HCl(aq) → NiCl2(aq) + H2(g) In this...

June 2018 NY Regents Chemistry Exam 24 Which process requires energy to decompose a substance? (1) electrolysis (2) neutralization (3)...

June 2018 NY Regents Chemistry Exam 23 Which energy conversion occurs in an operating voltaic cell? (1) chemical energy to electrical...

January 2018 NY Regents Chemistry Exam 23 Which device requires electrical energy to produce a chemical change? (1) electrolytic cell...

January 2018 NY Regents Chemistry Exam 22 Which change occurs at the anode in an operating electrochemical cell? (1) gain of protons (2)...

August 2018 NY Regents Chemistry Exam 46 Given the equation representing a reaction: Cd+NiO2+2H2O→Cd(OH)2 + Ni(OH)2 Which half-reaction...

August 2018 NY Regents Chemistry Exam 26 Which reaction occurs at the anode in an electrochemical cell? (1) oxidation (2) reduction (3)...