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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: stopkillingme21 on January 31, 2018, 04:36:50 PM

Title: Calculating simple ratios
Post by: stopkillingme21 on January 31, 2018, 04:36:50 PM

We're using 40 mL of Caprolactone in our lab tomorrow. The ratio is Caprolactone : Sn(Oct)2 : 1-octanol

The possibilities for assigned ratios are 100:1:1; 300:1:1; or 600:1:1

So in all 3 cases, we will use 40 mL of Caprolactone. How do I calculate the volume of the other 2 reactants, depending on each ratio?

ANSWER: "Multiply the volume of caprolactone by its density and divide by its molar mass. That gives you the number of moles of caprolactone. Divide that number by 100, 300 or 600 (whichever one it is). For Sn(Oct)2 and 1-octanol multiply that number by its molar mass and divide by its density. Gives you its volume." Thanks Reddit user u/gmsteel

Title: Re: Calculating simple ratios
Post by: sjb on January 31, 2018, 04:53:05 PM

Is the ratio by volume, by moles, by mass, a mixture?