How many grams of CaCl2 are in 250 mL of 2.0 M CaCl2?

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26-10-2017
Chemistry

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How many grams of CaCl2 are in 250 mL of 2.0 M CaCl2?

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pmayl pmayl · Answer 1 · 2017-10-26T23:04:46+02:00

In order to figure out how many grams of CaCl2 are contained in a liter, we must first consider how many grams are contained in a mole.
How many grams is 1 mole of CaCl2?
1 mole of CaCl2 is 1 mole of Ca and 2 moles of Cl
1 mole of Ca weighs 40 g, and 2 moles of Cl weighs roughly 35x2=70 grams.
Therefore, 1 mole of CaCl2 weighs about 110 grams. Consult a periodic table for more precise numbers (weight of 1 mole is the atomic mass).

There are 2 moles of CaCl2 per liter, so 1 liter contains 110 x 2 = 220 grams of CaCl2.
220grams/Liter * .250L = 55g/liter

aolvera1216 aolvera1216 · Answer 2 · 2020-05-02T02:01:44+02:00