Question

What is the chemical formula of borax beads?

Answer 1

Hint : To answer this question, we first need to understand what chemical compound. A chemical compound is a substance made up of numerous identical molecules bound together by chemical bonds and made up of atoms from different elements. As a result, a molecule made up of only one element's atoms is not a compound.

Complete Step By Step Answer:
Chemical formula - A chemical formula is a technique of expressing information on the chemical quantities of atoms that make up a chemical compound or molecule using chemical element symbols, numbers, and other symbols like parentheses, dashes, brackets, commas, and plus and minus signs.
Borax bead – When powdered borax, $N{a_2}{B_4}{O_7}{\text{ }} \bullet 10{H_2}O$, is heated vigorously in a Bunsen burner, a colorless translucent glassy bead known as borax bead is formed, which is composed of sodium meta borate and boric oxide. The metals in a solution are detected using a borax bead. It's utilized for qualitative inorganic analysis.
A tiny loop is formed at the end of a platinum or nichrome wire and heated till red hot in a Bunsen burner flame. It's also possible to use a stick made of another inert substance, such as magnesia (MgO). It is then immersed in powdered borax and kept in the hottest area of the flame, where it expands as it loses its crystallization water and then shrinks, forming a colorless, transparent glass-like bead (a mixture of sodium metaborate and boric anhydride).
After cooling, the bead is wetted and dipped into the sample to be analyzed, allowing only a small amount of the substance to adhere to the bead. The bead will become black and opaque if too much material is utilized. The bead and adhering substance are next burned in the lower, reducing region of the flame, cooled, and the color examined. It is next burned in the upper, oxidizing, section of the flame, cooled, and the color examined once more.
So, we conclude that the chemical formula of borax beads is $N{a_2}{B_4}{O_7}{\text{ }} \bullet 10{H_2}O$.

Note :
A chemical test that reveals whether or not a sample contains particular metals. A clear vitreous borax bead fused in a wire loop reacts chemically with the salts of specific metals to produce colors that assist identify the metal; for example, manganese compounds make a violet bead, cobalt compounds produce a deep blue, and so on.