Give the names of the elements present in the following compounds:; (a) Quick lime; (b) Hydrogen bromide; (c) Baking powder; (d) Potassium sulphate
Answers
a) Quicklime is calcium oxide Cao. The elements in it are Calcium (Ca) and oxygen (O)
(b) Hydrogen bromide is HBR. The elements in it are Hydrogen (H) and bromine (Br)
(c) Baking soda is sodium hydrogencarbonate, NaHCO3. The elements present are sodium (Na), Hydrogen (H), Carbon (Ca), oxygen (O)
(d) Potassium sulphate is K2SO4. The elements present are Potassium (K), Sulphur (S), Oxygen (O)
Answer:
Explanation:
The names of elements present can be given only if the chemical formula of the compound is known. For example,
(a) Quick lime : It is the commercial name of the compound. Its chemical name is calcium oxide and the
chemical formula is CaO.
Elements present : calcium (Ca) : oxygen (O).
(b) Hydrogen bromide : The chemical formula of the compound is HBr
Elements present : hydrogen (H) ; bromine (Br).
(c) Baking powder : It is the commercial name of the compound. Its chemical name is sodium hydrogen carbonate and the chemical formula is NaHCO3
Elements present : sodium (Na), hydrogen (H), carbon (C), oxygen (O).
(d) Potassium sulphate : The chemical formula of the compound is K2SO4
Elements present : potassium (K), sulphur (S), oxygen (O).