Zinc Hydroxide: Overview, Questions, Preparation

Zinc Hydroxide can be set up by adding sodium hydroxide mix, not in abundance. Then, a transparent white precipitate will form:

Zn2+ is a form of Hexa-aqua ions and tetra- aqua ions, the first one with the high-water level and the latter with a low level of water. It can be more appropriately written as follows:

Here, aq stands for Aqua.

Some of the other examples are as follows:

If sodium hydroxide is added in abundance, then the precipitate of the zinc hydroxide solution will dissolve and it will turn into a colourless solution. The illustrated formula is:

This can be sometimes used to find out the concentration for zinc ions in the formed solution but sometimes it can be switched with aluminum and lead as they both somewhat hold the same uses as well.

As can be seen from the above formulas that zinc hydroxide is soluble in water or it can dissolve in it because the ion itself is rounded against water particles. But when added sodium hydroxide in abundance the ions will diminish their complexity with a -2 charge and it makes it dissolvable/soluble. At the point when excess alkali is added, it sets up a balanced state which forms hydroxide ion and the reaction caused is the same as sodium hydroxide and it creates a +2 charge, thus making it soluble. 

1. It is widely used in the preparation of medicines or surgical dressings as it functions as an absorbent. Bandages that are used after surgeries are coated with the zinc substance to absorb the blood from the wound.
2. Galvanization is the process in which steel and iron are coated with a layer of zinc and it is highly used in this process. Zinc prevents steel and iron from getting rusted.
3. It is also used for electrical rechargeable batteries.
4. It is regularly utilized as a medium for the business production of pesticides and their pigments.
5. Oddly it is also used as a compounding agent between different ingredients of rubber. 
6. It also can be used as a mordant which means that it is used to set the dyes of fabrics or tissues.

As per the breakdown of marks for the ongoing year 2021, This chapter of Acids, bases & salts holds a weightage of 4 marks.