Measure the mass of a solute. Bash it into a volumetric flask. Add some solvent, shake to dissolve. Make up the solvent to the mark on the flask, ensuring the bottom of the meniscus is in line with the mark. Shake. w00t
Measure the mass of a solute. Bash it into a volumetric flask. Add some solvent, shake to dissolve. Make up the solvent to the mark on the flask, ensuring the bottom of the meniscus is in line with the mark. Shake. w00t
but dont we need to kno the concentration of the standard solution well ???
Don't forget that not all compounds can be used to make a standard solution. The solute must have certain characteristics to be considered for a primary standard solution:
1. It must be available in a highly pure form (Analar, for example) 2. It must be stable in the environment (not hygroscopic, deliquescent or efflorescent) and aqueous solution. 3. It should have a relatively high molar mass (preferably) 4. It must react quantitatively with the required compounds. 5. It must be soluble (yes, obvious, I know)
Seconday standards must themselves be determined using primary standard solutions before use.
Don't forget that not all compounds can be used to make a standard solution. The solute must have certain characteristics to be considered for a primary standard solution:
1. It must be available in a highly pure form (Analar, for example) 2. It must be stable in the environment (not hygroscopic, deliquescent or efflorescent) and aqueous solution. 3. It should have a relatively high molar mass (preferably) 4. It must react quantitatively with the required compounds. 5. It must be soluble (yes, obvious, I know)
Seconday standards must themselves be determined using primary standard solutions before use.