you dissolve CaCl2 in water to make a mixture that is 36.5% CaCl2 by mass. If th

Question

you dissolve CaCl2 in water to make a mixture that is 36.5% CaCl2 by mass. If the total mass of the mixture is 167.5g, what masses of CaCl2 and water should be used?
Please explain each step, I'm having a really hard time understanding these problems. Thank you so much! you dissolve CaCl2 in water to make a mixture that is 36.5% CaCl2 by mass. If the total mass of the mixture is 167.5g, what masses of CaCl2 and water should be used?
Please explain each step, I'm having a really hard time understanding these problems. Thank you so much! you dissolve CaCl2 in water to make a mixture that is 36.5% CaCl2 by mass. If the total mass of the mixture is 167.5g, what masses of CaCl2 and water should be used?
Please explain each step, I'm having a really hard time understanding these problems. Thank you so much!

Explanation / Answer

we know that

mass percent = ( mass of CaCl2 / mass of the mixture ) x 100

given

mass percent = 36.5

mass of the mixture = 167.5

so

using those values

we get

36.5 = ( mass of CaCl2 / 167.5 ) x 100

mass of CaCl2 = 61.1375

so

the mass of CaCl2 should be 61.1375 g

now

mass of mixture = mass of water + mass of CaCl2

so

167.5 = mass of water + 61.1375

so

mass of water = 106.3625

so

the mass of water should be 106.3625 g

and

the mass of CaCl2 should be 61.1375 g

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