Why is it important to neutralize the zinc solution

Double displacement reactions of this type are called neutralization reactions. We can write an expanded version of this equation, with aqueous substances written in their longer form:. The acid and base have neutralized each other, and the acidic and basic properties are no longer present. Salt solutions do not always have a pH of 7, however. Through a process known as hydrolysis , the ions produced when an acid and base combine may react with the water molecules to produce a solution that is slightly acidic or basic.

As a general concept, if a strong acid is mixed with a weak base, the resulting solution will be slightly acidic. If a strong base is mixed with a weak acid, the solution will be slightly basic. Calcium propionate is used to inhibit the growth of molds in foods, tobacco, and some medicines.

Zinc oxide is insoluble in water. State and explain whether zinc oxide is a base, an alkali, or both. Zinc oxide is a base, because it reacts with an acid to form a salt and water. It is not an alkali because it does not dissolve in water. A neutralisation reaction is a reaction between an acid and a base. In acid-alkali neutralisation reactions, hydrogen ions from the acid react with hydroxide ions from the alkali:.

Zinc concentrations in the River Rhine have reached optimal values. Unfortunately, locations of historical contamination still exist. A total of five stable zinc isotopes occur naturally, among which are 64 Zn, 66 Zn en 68 Zn.

We now know of about fifteen instable zinc isotopes. Zinc appears to accumulates in some organisms. The human body contains approximately 2. Its functions involve mainly enzymatic processes and DNA replication. The human hormone insulin contains zinc, and it plays an important role in sexual development.

Minimum daily intake is g, this prevents deficiencies. Symptoms of zinc deficiencies are tastelessness and loss of appetite. Children's immune systems and enzyme systems may be affected. Higher zinc application appears to protect people from cadmium poisoning.

Zinc may also decrease lead absorption. The relation copper : zinc in the human body is an important characteristic. One may also absorb zinc overdoses.

This does not occur very regularly. Symptoms include nausea, vomiting, dizziness, colics, fevers and diarrhoea and mostly occur after intake of g of zinc.

Intake of 2 g of zinc sulphate at once cause acute toxicity leading to stomach aches and vomiting. Strikingly, zinc belongs to the same elemental group in the periodic chart as cadmium and mercury , which are both toxic.

Examples of zinc-related health effects also include mucous membrane infection from zinc chloride lethal dose g , and zinc vitriol poisoning lethal dose 5 g. Zinc may be removed from water by different methods.

To achieve a level that meets legal standards, one may apply such techniques as coagulation , ion exchange and active carbon.