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3 years ago

What is the molar mass of Ca(OH)2

Chemistry

2 answers:

ikadub [295]3 years ago

8 0

Answer:

74 gmol-1

Explanation:

Molar masses

Ca= 40

O = 16

H = 1

Molar mass of Ca(OH)2 = 40+16*2+1*2

= 40+32+2

=74

gavmur [86]3 years ago

4 0

Answer:

The molar mass of Ca(OH)2 is 74.092 g/mol

Explanation:

First your going to find the atomic mass of each element on the periodic table.

Ca(Calcium) = 40.078

O(Oxygen) = 15.999

H(Hydrogen) = 1.008

Then we can create the equation:

40.078 + (15.999 + 1.008) × 2

40.078 + (17.007) × 2

40.078 + 34.014

= 74.092 g/mol

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Read 2 more answers

If 500.0 mL of 0.10 M Ca2+ is mixed with 500.0 mL of 0.10 M SO42−, what mass of calcium sulfate will precipitate? Ksp for CaSO4

statuscvo [17]

Answer:

The mass of calcium sulfate that will precipitate is 6.14 grams

Explanation:

Step 1: Data given

500.0 mL of 0.10 M Ca^2+ is mixed with 500.0 mL of 0.10 M SO4^2−

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Step 4: Calculate total volume

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Step 5: Calculate Q

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Step 6: Calculate molar solubility

Ksp = 2.40 * 10^-5 = [Ca2+][SO42-] =(x)(x)

2.40 * 10^-5 = x²

x = √(2.40 * 10^-5)

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Step 7: Calculate total CaSO4 dissolved

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Since initial moles CaSo4 = 0.050

Initial mass of CaSO4 = 0.050 * 136.14 g/mol

Initial mass of CaSO4 = 6.807 grams

Step 9: Calculate mass precipitate

6.807 - 0.667 = 6.14 grams

The mass of calcium sulfate that will precipitate is 6.14 grams

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