Question

Borax bead test is responded by________

Answer 1

Borax bead test is responded by meta borates of many transition metals.

• A borax bead test can be used to determine the meta borates of several transition metals since they have distinctive colors.
• The bead test, also known as the blister test or borax bead test, is an analytical method used to detect the presence of particular metals.
• The matching metal metaborates are formed when the shiny bead is heated after being dipped in the metal oxide. We are able to identify the metal by the distinct color of these metaborates.
• The chemical reaction can be depicted as:

$$\begin{gathered} {\mathrm{Na}}_2{\mathrm{B}}_4{\mathrm{O}}_7\left(\mathrm{s}\right)\stackrel{∆}{\to }2{\mathrm{NaBO}}_2\left(\mathrm{s}\right)+{\mathrm{B}}_2{\mathrm{O}}_3\left(\mathrm{s}\right) \\ \mathrm{Salt}\mathrm{of}\mathrm{Co}\stackrel{∆}{\to }\mathrm{CoO}\left(\mathrm{s}\right)+\mathrm{gas} \\ \mathrm{CoO}\left(\mathrm{s}\right)+{\mathrm{B}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)\stackrel{∆}{\to }\mathrm{Co}{\left({\mathrm{BO}}_2\right)}_2\left(\mathrm{s}\right) \\ \mathrm{cobalt}\mathrm{metaborate} \end{gathered}$$