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Allushta [10]
2 years ago
7

"calculate the h+ in a solution that has a ph of 8.73"

Chemistry
1 answer:
alexdok [17]2 years ago
8 0
The  H+   in  a  solution  that  has  a Ph  of  8.73   is   calculate    as  follows

Ph is always =   -  log  (H+)

H+  =    10^-Ph

H+  is  therefore  =  10 ^-  8.73
H+  =  1.86  x10^-9  M
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Explanation:

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7 0
2 years ago
What is the volume of 0.250 m hydrochloric acid required to react completely with 20.0 ml of 0.250 m ca(oh)2?
Soloha48 [4]
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Ca(OH)₂ + 2HCl ----> CaCl₂ + 2H₂O
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according to molar ratio of 1:2
number of HCl moles required = 2 x number of Ca(OH)₂ moles reacted
number of HCl moles = 5.00 x 10⁻³ x 2 = 10.0 x 10⁻³ mol
molarity of HCl solution - 0.250 M
there are 0.250 mol  in volume of 1 L
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40.0 mL of 0.250 M HCl is required
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