What is the concentration in normality of NAOH (19.5CM3)
You need to know how many moles of NaOH is in some volume.
NormalityNaOH=1*molesNaOH/volumesolutioninLIters
To determine the concentration of NaOH in normality, you need to know the volume of NaOH and the number of moles of NaOH present.
First, convert the given volume of NaOH from cm^3 to liters:
19.5 cm^3 = 19.5 / 1000 = 0.0195 L
The balanced chemical equation for NaOH is:
NaOH + HCl → NaCl + H2O
From the equation, you can see that 1 mole of NaOH reacts with 1 mole of HCl.
Now, you need to know the number of moles of NaOH. Since you're only given the volume, you can use the concept of molarity.
Molarity (M) is defined as moles of solute divided by liters of solution.
You need to know either the molarity or the mass of NaOH to calculate the number of moles.
If you have the molarity, you can multiply it by the volume of NaOH in liters to get moles of NaOH.
If you have the mass of NaOH, you can divide it by the molar mass of NaOH to get moles of NaOH.
Once you have the number of moles of NaOH, you can determine the normality.
Normality (N) is defined as moles of solute divided by the equivalent weight.
For NaOH, the equivalent weight is equal to its molar mass (40.00 g/mol) because it reacts in a 1:1 ratio with HCl.
So, to calculate the concentration of NaOH in normality, you need to know either the molarity or the mass of NaOH.