Question

5. What do you understand by petrochemical products?
Products made from petrochemicals include such items as plastics, soaps and detergents, solvents, drugs, fertilizers, pesticides, explosives, synthetic fibres and rubbers, paints, epoxy resins, and flooring and insulating materials.
Petrochemicals (sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane.
Drive HCO3 – CO32, when PH=PKa2
And then the value of PH affects the calcium carbonate systems. If the total carbonates concentration I water system was 2.5x10-2M at PH of 9.00.calculate  CO32, [CO32] and [Ca2].

Answer 1

$\huge \mathfrak \fcolorbox{cyan}{lightcyan}{Answer♡}$

Reactivity Series in chemistry is an experimental, structural and logical progression of series of metals in order of reactivity from highest to lowest. Metals react differently with different substances. It gives a descriptive detail on metal reactions with the extraction of metals from ores and with acids and water.