why the HCl bottles in the laboratory only have 36% concentration and not 100%?

Answer 1

Because at concentrations over 38%,

The evaporation rate is then so high that storage and handling need extra precautions, such as pressure and low temperature.

Answer 2

Hydrochloric acid is produced in solutions up to 38% HCl (concentrated grade). Higher concentrations up to just over 40% are chemically possible, but the evaporation rate is then so high that storage and handling need extra precautions, such as pressure and low temperature. Bulk industrial-grade is therefore 30% to 34%, optimized for effective transport and limited product loss by HCl vapors. Solutions for household purposes, mostly cleaning, are typically 10% to 12%, with strong recommendations to dilute before use.....

Answer 3

Hydrochloric acid as the binary (two-component) mixture of HCl and H2O has a constant-boiling azeotrope at 20.2% HCl and 108.6 °C (227 °F). There are four constant-crystallization eutectic points for hydrochloric acid, between the crystal form of HCl·H2O (68% HCl), HCl·2H2O (51% HCl), HCl·3H2O (41% HCl), HCl·6H2O (25% HCl), and ice (0% HCl). There is also a metastable eutectic point at 24.8% between ice and the HCl·3H2O crystallization


Production
Main article: hydrogen chloride
Hydrochloric acid is prepared by dissolving hydrogen chloride in water. Hydrogen chloride can be generated in many ways, and thus several different precursors to hydrochloric acid exist. The large scale production of hydrochloric acid is almost always integrated with other industrial scale chemicals production.


It is a gas much much like chlorine the bleach you use at home is diatomic gas at a 100% concentration

Answer 4

It's what they bought. Concentrated HCl ranges from 32% to 38%.

Higher concentrations are possible, but they are considerably more expensive to produce. The 32-38% concentrations are sufficiently concentrated for every lab test I've ever heard of.

Answer 5

100% HCl is a gas!

And not a solution in water...