Mistake using the stochio trick

Hi Ari,

I tried using your stochiometry trick from this video: https://imat.entermedschool.com/t/marathon-mrt-39-bmat-2017-q26-important-using-the-stochio-table-one-last-time-9-01/2872?u=juliette

However i wasn’t able to find the correct number of moles.
I calculated 0,1 moles of CaCl2. From that i found 0,2 AgNO3 and 0,1 Ca(NO3)2 using the ratios, but this was incorrect.

This is my work below, and i’ve written the correction in red.
What is my mistake?
Thank you!