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Zolol [24]
3 years ago
14

How many significant digits are in the measurement 64,000 mg A.2 B.3 C.4 D.5

Chemistry
1 answer:
Y_Kistochka [10]3 years ago
8 0
5 because the 0's all matter.
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Calcium hydroxide is a strong base but is not very soluble ( Ksp = 5.02 X 10-6 ). What is the pH of a saturated solution of Ca(O
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The expression for solubility constant for this reaction will be,

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K_{sp}=(s)\times (2s)^2

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Now put the value of K_[sp} in this expression, we get the solubility.

5.02\times 10^{-6}=(4s)^3

s=1.079\times 10^{-2}M

The concentration of Ca^{2+} ion = s = 1.079\times 10^{-2}M

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First we have to calculate the pOH.

pOH=-\log [OH^-]

pOH=-\log (2.158\times 10^{-2})

pOH=1.67

Now we have to calculate the pH.

pH+pOH=14\\\\pH=14-pOH\\\\pH=14-1.67=12.33

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