A tank containing ammonia and argon has a total pressure equal to 1.8 atm. The pressure of the ammonia is 1.2 atm. What is the pressure of the argon gas?

Question

1904 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-04T02:20:43

#Ar# = .6 atm

Partial pressures will add to the total pressure.

Partial atm. + partial atm. , etc = total atm.

#NH_3# + #Ar# = #1.8# atm
#1.2# + #Ar# = #1.8# atm

Subtract 1.2 atm from both sides.

#Ar# = .6 atm

Answer 2 · 2018-05-04T11:56:45

#0.6 \ "atm"#

Dalton's law of partial pressures states that:

#P_1+P_2+P_3+...+P_n=P_"total"#

where #P_1,P_2,...,P_n# are the pressures of gases in a system.

So here, we got:

#P_"total"=P_(Ar)+P_(NH_3)#

#1.8 \ "atm"=P_(Ar)+1.2 \ "atm"#

#:.P_(Ar)=0.6 \ "atm"#