Hurrr a buffer is made using hco2na. which other substance should the buffer contain?

To answer this problem, let us first define what a buffer solution is.

A buffer solution by definition is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or a weak base and its conjugate acid.

In this case, we have are going to have a mixture of a weak acid and its conjugate base. Sodium Formate or HCOONa is the conjugate base of that weak acid. Sodium formate is properly written as:

HCOO-Na+

We can find the weak acid by replacing Na+ with H+. Therefore, the other substance should be:

HCOO-H+

or

HCOOH

Formic Acid = HCOOH

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explanation:

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).