In Standardization of NaOH, why can the flasks you put your samples of acid into be wet?
2 answers
Wet with water? Because the acid creates heat and spits acid back in the chemist's face.
Is this CAN or CAN'T be wet?
If CAN, you must be thinking that it dilutes the acid if the flask is wet. Of course, that's true; however, it dilutes the base by the same amount when you add NaOH to titrate it. A much more sophisticated answer is that adding acid to a flask contains x mols of the acid (molarity x liters = moles). The indicator changes when the MOLES of acid and MOLES of base are equal. Adding water before or during the titration doesn't change the number of moles of either acid or base.
If CAN, you must be thinking that it dilutes the acid if the flask is wet. Of course, that's true; however, it dilutes the base by the same amount when you add NaOH to titrate it. A much more sophisticated answer is that adding acid to a flask contains x mols of the acid (molarity x liters = moles). The indicator changes when the MOLES of acid and MOLES of base are equal. Adding water before or during the titration doesn't change the number of moles of either acid or base.
1 answer