Help with Question (1 Viewer)

[ebony_17]

Can someone please help me with this question. I forget how to calculate these.

Magnesium reacts with dilute hydrochloric acid. Calculate the volume of gas produced at 25°C and 100kPa when 5.0 grams of magnesium completely reacts.

 

[jazz519]

Write an equation: Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)
Find moles using n=m/MM
Do molar ratio with Mg and H2 to find moles of H2
Use n = V/Vm to find volume of H2 gas

25 degrees and 100 kPa means Vm = 24.79 in that above formula (using the data sheet)

 

[ebony_17]

thank you. That's much clearer now