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GREYUIT [131]
3 years ago
8

The graph of y = 3x2 + 12x + 11 is shown.

Chemistry
1 answer:
Elza [17]3 years ago
5 0

Explanation:

3*2=6

12x+11=23x

23x+6=29x

x=2

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At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate from the effluent. Assume the following reactions
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Answer : The concentration of Fe^{3+} needed is, 2.37\times 10^4M

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First we have to calculate the mole of phosphate.

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\text{Moles of phosphate}=\frac{\text{Mass of phosphate}}{\text{Molar mass of phosphate}}

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\text{Moles of phosphate}=\frac{1mg}{94.97g/mol}=\frac{0.001g}{94.97g/mol}=1.053\times 10^{-5}mol

Now we have to calculate the concentration of phosphate.

\text{Concentration of phosphate}=\frac{\text{Moles of phosphate}}{\text{Volume of solution}}

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Now we have to calculate the concentration of Fe^{3+}.

The second equilibrium reaction is,

FePO_4\rightleftharpoons Fe^{3+}+PO_4^{3-}

The solubility constant expression for this reaction is:

K_{sp}=[Fe^{3+}][PO_4^{3-}]

Given: K_{sp}=\frac{1}{4}

\frac{1}{4}=[Fe^{3+}]\times 1.053\times 10^{-5}mol/L

[Fe^{3+}]=2.37\times 10^4M

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Explanation:

Hope it helps! Enjoy

8 0
3 years ago
Read 2 more answers
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