There are something about the neutralization titration to determine magnesium oxide.
The sodium hydroxide titrant(0.1mol/L)
Preparation: taking 56mL of the cleared saturated sodium hydroxide solution, and make it into 1000mL after adding cold water which boiled out.
Standardization: taking about 6.0g of standard potassium acid phthalate which drying to constant weight in 105℃. After precision weighing, it should add 50mL of cold water which boiled out, dissolving it through shaking out. Adding two drops phenolphthalein indicator solution, it should make the standard potassium acid phthalate dissolve completely when near the finish line, titrating into the titrate shows pink. Each 1mL of sodium hydroxide titrant amounts to 204.2mg of standard potassium acid phthalate. According to the consumption of this liquid and the dosage of potassium acid phthalate, it can work out the concentration.
Storage: put into the polyethylene plastic bottle and seal preservation. There are two holes in the bottle stopper, each hole inserts a glass tube. One glass tube connects with soda lime tube, and another tube used for suck out the liquid.
The above is from Hebei Meishen Technology Co., Ltd.