Question 43 - Chemical and Physical Foundations of Biological Systems Practice Test for the MCAT

A bottle of concentrated hydrochloric acid has a mass percent of \(37.2\)% and a density of \(1.18\) g/mL. What is the molarity of concentrated hydrochloric acid? (You may consult the attachment.)

A chemical solution is a homogeneous mixture of one or more substances called “solutes” in another substance called “solvent”. The concentration of a solution is the amount of solute that is dissolved in a certain amount or solvent or solution.

There are different units to represent the concentration of a solution, among them there are the molarity (M), defined as the moles of solute present in 1 L of solution; molality, (m) defined as the moles of solute dissolved in 1 kg of solvent; and percentage by mass (%m), which represents the grams of solute dissolved in 100 g of solution.

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