0.5008 g of an unknown triprotic acid, H3A, is dissolved in 47.3 mL of water and then titrated with 0.315 M NaOH. It takes 25.72 mL of the NaOH solution to completely neutralize the acid. What is the molar mass of this acid

The molar mass is "185.44 g/mol".

Explanation:

According to the question,

The moles of NaOH will be:

=

=

Number of moles of an acid will be:

=

=

We know that,

⇒

hence,

Molar mass of unknown acid will be:

=

=

=

answerto predict;

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.