Write the product formed when 36.5g of HCL made to react with 50g of NaOH. Predict the PH of the result and solution.
Answers
The concentration of a solution can be shown in g/dm3 or mol/dm3. It is often more useful to know the concentration of a reactant in mol/dm3 so that the amount of reactant in a given volume can be calculated.
Concentration using moles
The concentration of a solution can be calculated using:
the amount of dissolved solute in moles, mol
the volume of solution (or solvent) in cubic decimetres, dm3
\[Concentration~in~mol/dm^{3} = \frac{amount~of~solute~in~mol}{volume~in~dm^{3}}\]
Example
0.5 mol of sodium hydroxide is dissolved in 2 dm3 of water. Calculate the concentration of the sodium hydroxide solution formed.
\[Concentration~in~mol/dm^{3} = \frac{amount~of~solute~in~mol}{volume~in~dm^{3}}\]
Concentration = \(\frac{\textup{0.5~mol}}{\textup{2~dm}^3}\)
Concentration = 0.25 mol/dm3