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jasenka [17]
3 years ago
12

I need help with the first question, if you can help with the other two I would really appreciate it!​

Chemistry
1 answer:
Lorico [155]3 years ago
6 0

Answer:

5

Explanation:

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I don’t know if this works

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A common laboratory method for preparing a precipitate is to mix solutions containing the component ions. Does a precipitate for
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Answer:

CaF2 will not precipitate

Explanation:

Given

Volume of Ca(NO3)2 = 10 ml

Molar concentration of Ca(NO3)2 = 0.001

Volume of NaF = 10 ml

Molar concentration of  NaF  = 0.0001

Ksp for CaF2 = 3.2 * 10^ {-11}

CaF2 will precipitate if Q for the reaction is greater than ksp of CAF2

Moles of calcium ion

= 10 * 0.001\\= 0.01

[Ca2+] = \frac{0.01}{10 + 10} \\= \frac{0.01}{20} \\= 5 * 10^{-4}

Moles of F- ion

= 10 * 0.0001\\= 0.001

[F-] = \frac{0.001}{10 + 10} \\= \frac{0.001}{20} \\= 5 * 10^{-5}

Q = [Ca2+] [F-]^2\\= (5 * 10^{-4}) * (0.5* 10^-4)\\= 1.25 * 10^{-12}

Q is lesser than Ksp value of CaF2. Hence it will not precipitate

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3 years ago
Tracy observes an organism that lives in a lake by her house. The organism has an internal skeleton, scales, fins, and gills. Th
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WILL MARK BRAINIEST <br><br> Can someone please help me understand this?
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To convert from moles to grams you divide by the molar mass of the element. To convert from grams to moles you X by the molar mass element

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What two quantities must be known to calculate the density of a sample of matter? A) mass and volume B) length and mass C) size
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