Electrochemistry Review

In which of the following does chlorine have an oxidation state of +1?

• NaCl

• NaClO₂

• NaClO

• Cl₂

In a redox reaction how doe the number of electrons lost compare to the number of electrons gained?

• the number lost is sometimes equal to the number gained

• the number lost is always equal to the number gained

• the number lost is always greater than the number gained

• the number lost is always less than the number gained

What type of reaction occurs when a metal atom becomes a positive ion?

• oxidation

• reduction

• neutralization

• double replacement

When a Mg atom becomes a Mg²⁺ ion, the number of protons in the nucleus

• increases

• decreases

• stays the same

Tags

NGSS.HS-PS1-7

During an oxidation-reduction reaction there is a conservation of

• mass only

• charge only

• mass and charge

• neither mass or charge

Tags

NGSS.HS-PS1-7

Which of the following reactions is a redox reaction?

• NaOH + HCl --> NaCl + H₂O

• Fe + 2 HCl --> FeCl₂ + H₂

• MgO + H₂SO4 --> H₂O

• AgNO₃ + KI --> KNO₃ + AgI

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In a redox reaction, the oxidizing agent will

• lose electrons and be reduced

• lose electrons and be oxidized

• gain electrons and be reduced

• gain electrons and be oxidized

Which of the following metals will react spontaneously with a solution containing iron ions?

• Sn

• Al

• Cu

• Pb

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the is the oxidation half reaction for the following redox reaction?

Cu + 2 AgNO₃ --> Cu(NO₃)₂ + 2 Ag

• Cu --> Cu²⁺ + 2 e^-

• Cu + 2 e^- --> Cu²⁺

• Ag⁺ + e^- --> Ag

• Ag⁺ --> Ag + 2 e^-

Which metal is used as a coating on steel to limit corrosion?

• K

• Na

• Zn

• Ca