First of all, to be based on the quality of preparation of the
sodium hydroxide solution, sodium hydroxide needed to calculate the quality of
drugs and solvent water quality. Such as: Preparation of 100g sodium hydroxide
solution, sodium hydroxide required to solute 10g, water demand 90g; the balance
has been transferred balance will be a clean beaker tray into the left disk, and
then adjust the balance by adding weight, and then the necessary increase in the
quality of weight solute to the beaker slowly adding solid sodium hydroxide
until the scales balance; with the cylinder capacity to take the necessary
volume of water, (90ml) slowly into the beaker with a glass rod stirring, until
complete dissolution can be.
sodium hydroxide solution, sodium hydroxide needed to calculate the quality of
drugs and solvent water quality. Such as: Preparation of 100g sodium hydroxide
solution, sodium hydroxide required to solute 10g, water demand 90g; the balance
has been transferred balance will be a clean beaker tray into the left disk, and
then adjust the balance by adding weight, and then the necessary increase in the
quality of weight solute to the beaker slowly adding solid sodium hydroxide
until the scales balance; with the cylinder capacity to take the necessary
volume of water, (90ml) slowly into the beaker with a glass rod stirring, until
complete dissolution can be.