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Determine Ph of a solution

Imee_34011

Hi, how do i create a solution of ph approximately 9?

with:

____g of calcium hydroxide and ____g of water?

I'm trying to some sort of "Spherification" by boiling a batter containing konjac in a ph9 solution. Will that work?

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Kieran_48719

Been a while since I did chemistry calculations but here goes.

You want pH 9, so a pOH of 5.

10^-5 = 0.00001

Ca(OH)2 (aq) ---> Ca2+ + 2OH-

0.00001 / 2 = 0.000005 M Ca(OH)2

74.093g X 0.000005 = 0.000370465

So for pH 9 you want 0.000370465g Ca(OH)2 in 1000g water.

Kieran_48719

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lfmichaud

Saturation of Calcium Hydroxide got a ph of about 11.25 at room temperature. You can make a saturated solution of Calcium Hydroxide and mix a part of it with 175 its volume in water to get your ph. But please be careful when you work with that!