Q18 2011 (1 Viewer)

[Mathsisfun15]

Can someone do the working for it. I keep getting 122g

 

[michaelhannigan]

No. moles HCl= 24.4/1000 x 0.1= no.moles NaX in 20mL sample ( includes 0.2 g NaX)
Therefore, Molar mass NaX= mass/no.moles= 0.2 x 1000/ 24.4 x 0.01 = 81.97... (A)

 

[michaelhannigan]

Let me know if the answer is A though?

 

[Mathsisfun15]

yeah it is. Thanks mate

 

[Mr_Kap]

I got C. Can you explain what you did and why please?

 

[Mr_Kap]

bump