NaOH+HNO3---> NaNO3+H2O
calculate the number of moles of every ion present in solution after the reaction has occurred.
Th secret here is to know which compounds are ionic (thus they dissociate) and which are not (and remain molecular).
It is not possible unless you know the amount of reactants you started with.
YES 15g NaOH dissolves in 150 mL of 0.250 M nitric acid.
Here is a sample stoichiometry problem I have posted on Jiskha. Remember that moles = M x L.
http://www.jiskha.com/science/chemistry/stoichiometry.html
To calculate the number of moles of the ions present in the solution after the reaction has occurred, we first need to determine the balanced chemical equation for the reaction between NaOH and HNO3.
The balanced equation is as follows:
NaOH + HNO3 → NaNO3 + H2O
According to the equation, we know that one mole of NaOH reacts with one mole of HNO3 to produce one mole of NaNO3 and one mole of H2O.
Now let's calculate the number of moles of each ion present in solution after the reaction:
1. Sodium ion (Na+):
Since NaOH dissociates completely in water, it will produce one mole of Na+ ions for every mole of NaOH used. Therefore, the number of moles of Na+ ions present in the solution would be equal to the number of moles of NaOH used.
2. Nitrate ion (NO3-):
Similarly, since HNO3 dissociates completely in water, it will produce one mole of NO3- ions for every mole of HNO3 used. Therefore, the number of moles of NO3- ions present in the solution would be equal to the number of moles of HNO3 used.
3. Hydroxide ion (OH-):
NaOH is a strong base and dissociates completely in water, producing one mole of OH- ions for every mole of NaOH used.
4. Water (H2O):
The balanced equation shows that one mole of NaOH reacts with one mole of HNO3 to produce one mole of H2O. Therefore, the number of moles of H2O formed would be equal to the number of moles of NaOH or HNO3 used.
To calculate the number of moles for each ion, you would need to know the amount of NaOH and HNO3 used in the reaction. Once you know the amount (in moles or grams) of NaOH and HNO3, you can determine the number of moles of each ion using the mole ratios from the balanced equation.