Most plentiful no of particles in the solution?

[jadelamlam]

Homework Statement

Name all the particles present in 2M nitric acid.Underline the name(s) of the most plentiful particles(apart from water molecules)

Homework Equations

The Attempt at a Solution

model answer:Water molecules,hydrated hydrogen ions,nitrate ions,hydrated hydroxide ions.
Could anyone tell me why the number of hydrated hydrogen ions and nitrate ions in the solution are equal?

equation 1:
HNO3(l) + H2O(l) --> H+(aq) + NO3-(aq)

equation 2:
H2O(l) --> H+(aq) +OH-(aq) (Note:most of the water molecules are not ionized)
(ignore)<--

Combining both cases,the no of H+(aq) should be greater than the no of NO3-(aq).
What's wrong?

thx so much ))))

 

[Borek]

Nothing is wrong, you are right - concentration of H⁺ is slightly higher than the concentration of NO₃^-. This is especially visible in the case of very diluted solutions. But in "normal" solutions difference is negligible - when the concentration of the acid is higher than 7*10^-6M , difference in concentrations between H⁺ and NO₃^- is below 0.015%.

 

[jadelamlam]

thanks=]

 

[jadelamlam]

sorry,there is still a question
Name all the particles present in 1M aqueous ammonia solution.Underline the name(s) of the most plentiful particles(apart from water molecules)
Is it possible for us to delete the word "aqueous" in "aqueous ammonia solution"?
aqueous ammonia solution = ammonia solution?

 

[Borek]

Water is not the only solvent in which you can dissolve ammonia. It is the most popular one, but you can try to dissolve ammonia in any other liquid.