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Kobotan [32]
3 years ago
12

How to find the formula for sodium phosphate?

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
6 0
PO4 anion has a 3- charge.A sodium cation , has a 1+ charge.Now , you have to think how many Na ions you need to fully neutralize the PO4 's 3- charge. Answer 3. That's because a molecule must have a neutral charge (a 0 charge). 3+(-3)=0.So , sodium phosphate has the formula Na3PO4.


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Answer:

pH = 10.75

Explanation:

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Using the equation:

pH = 14 - pOH

We can find the pH of the solution.

The molarity of Ca(OH)₂ is 2.8x10⁻⁴M, as there are 2 moles of OH⁻ in 1 mole of Ca(OH)₂, the molarity of [OH⁻] is 2*2.8x10⁻⁴M = 5.6x10⁻⁴M

pOH is

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pOH = 3.25

pH = 14-pOH

<h3>pH = 10.75</h3>
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