When an AgNO3 solution is treated with 50.0 mL of HI gas to give 0.235 g of AgI, what is the temperature of the HI gas?
If the pressure of the gas is 1.00 atm, its temperature is 335 °C.
The steps to follow are:
- Write the balanced chemical equation.
- Convert grams of AgI → moles of AgI → moles if HI.
- Use the Ideal Gas Law to calculate the temperature of the gas.
AgNO₃ + HI → AgI + HNO₃
0.235 g AgI ×
You haven't given the pressure of the HI. I assume that it is 1 atm.
= (608.8 – 273.15) °C = 336 °C (3 significant figures)
This seems like a high temperature for the gas. If it had a different pressure, you will have to recalculate.
Here's a flow chart giving the general strategy for stoichiometry problems.