A student measures a pressure increase of 0.25 atm while collecting the H2 gas products from the reaction of Mg with HCl. The theoretical pressure change is 0.29 atm. What is the % yield

Thus the % yield is 86.2%

Explanation:

Percentage yield is the ratio of actual change to the theoretical change in terms of percentage.

The given reaction is :

To calculate the percent yield :

Given : Actual pressure increase = 0.25 atm

Theoretical pressure change = 0.29 atm.

Thus the % yield is 86.2%

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.