Unit 8 & 9 Chemistry

According to Reference Table J, which of these metals will react most readily with 1.0M HCl to produce H₂ gas?

• Ca
• K
• Mg 
• Zn

Tags

NGSS.HS-PS1-2

Which metal is more active than Ni and less active than Zn?

• Cu
• Mg
• Cr
• Pb

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which half reaction equation represents the reduction of an iron(II) ion?

• Fe²⁺ --> Fe^{+3 +} e^-
• Fe²⁺ + 2e^- --> Fe
• Fe³⁺ + e^- --> Fe²⁺
• Fe --> Fe²⁺ + 2e^-

Tags

NGSS.HS-PS1-7

A student collects the materials and equipment below to construct a voltaic cell
   -Two 250-ml beakers
   - wire and a switch
   -one strip of magnesium
   - one strip of copper
-125 ml of Mg(NO₃)₂
-125 ml of Cu(NO₃)₂
Which additional item is required for the construction of the voltaic cell

• anode
• cathode
• a batery
• a salt bridge

Given the balanced ionic equation representing the reaction in an operating voltaic cell:
Zn_(s) + Cu²⁺_(aq) --> Zn²⁺_(aq) + Cu_(s)
The flow of electrons through the external circuit in this cell is from the 

• Zn anode to the Cu cathode
• Zn cathode to the Cu anode
• Cu anode to the Zn cathode
• Cu cathode to the Zn anode

In order for a chemical reaction to occur, there must ALWAYS be

• a bond that breaks in a reactant particle
• an effective collision between reacting particles
• reacting particles with a high charge
• reacting particles with high kinetic energy

Tags

NGSS.HS-PS1-5

Given the following potential energy diagram, what is the activation energy of the forward reaction?

• 50 Kj
• 100 Kj
• 200 Kj
• 250 Kj

Tags

NGSS.HS-PS1-4

Given the following potential energy diagram, what type of reaction is this

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

Given the following potential energy diagram, this reaction is...

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

Given the following potential energy diagram, the activation energy for the reverse reaction is 

• 80 Kj
• 60 Kj
• 40 Kj
• 20 Kj

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1