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djverab [1.8K]
2 years ago
6

If 0.35 m of ammonia solution has a ph of 9.15, what is the h+ concentration of the solution?

Chemistry
1 answer:
Rasek [7]2 years ago
5 0
The pH of the substance is calculated through the equation,
                   pH = -log[H⁺]
This means that the pH of a certain substance is the negative log of the concentration of the H⁺ ions. In this item, we are given with the pH of the substance. 

Substituting the known value of pH,
              9.15 = -log[H⁺]

<em>The value of [H⁺] is 7.08 x 10⁻¹⁰.</em>
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Answer:

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Explanation:

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Read 2 more answers
A compound consisting of B, N, and H undergoes elemental analysis. The % composition by mass is found to be 40.28% B, 52.20% N,
swat32

Empirical formula is the simplest ratio of components making up a compound.

The percentage composition of each element has been given

therefore the mass present of each element in 100 g of compound is

                      B                                   N                         H

mass          40.28 g                         52.20 g                 7.53 g

number of moles  

                 40.28 g / 11 g/mol      52.20 g / 14 g/mol    7.53 g / 1 g/mol

                = 3.662 mol                  = 3.729 mol             = 7.53 mol

divide the number of moles by the least number of moles, that is 3.662

                3.662 / 3.662              3.729 / 3.662              7.53 / 3.662

               = 1.000                           = 1.018                        = 2.056

the ratio of the elements after rounding off to the nearest whole number is

B : N : H = 1 : 1 : 2

therefore empirical formula for the compound is B₁N₁H₂          

that can be written as BNH₂    

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