# Category: Solution Calculations

## Molarity of 98% (w/w) Ethanolamine (ETA)

The molarity of 98% (w/w) Ethanolamine (ETA) is 16.237 M. A 98% (w/w) Ethanolamine is a clear colorless solution. It…

## Molarity of 30% (w/w) Hydrochloric Acid (HCl)

The molarity of 30% (w/w) Hydrochloric Acid is 9.46 M. OVERVIEW A 30% (w/w) Hydrochloric Acid is a clear colorless…

## Molarity of 25% (w/w) Hydrochloric Acid (HCl)

The molarity of 25% (w/w) hydrochloric acid is 7.68 M. The 25% (w/w) hydrochloric acid contains 25g of HCl per 100g of solution. Since molarity is the number of moles of a substance present in a liter of solution, one must first calculate how much HCl is present in 1L of 25% hydrochloric acid solution. Once we know the amount of HCl present in 1L of solution, we can calculate the molarity of the solution by dividing the HCl amount by the HCl molecular weight.

## Preparation of 10 M Sodium Hydroxide from 50% (w/w) Stock Solution

OVERVIEW A 50% (w/w) Sodium Hydroxide can be purchased from several commercial suppliers. It is a clear colorless liquid and…

## Preparation of 1M Hydrochloric Acid From Concentrated Stock Solution (37%, w/w)

OVERVIEW A 37% (w/w) hydrochloric acid can be purchased from several suppliers. It is a clear colorless liquid and can…

## Molarity of 37% (w/w) Hydrochloric Acid (HCl)

A 37% (w/w) concentrated Hydrochloric acid is a clear colorless liquid. It is an aqueous solution of hydrogen chlori (HCl). The 100 g of 37% (w/w) Hydrochloric acid contains 37 g of HCl. To calculate the molarity, one must first calculate how much HCl is present in 1 L of 37% Hydrochloric acid solution. Once we know the amount of HCl present in 1 L solution, we can calculate the molarity of the solution by dividing the HCl amount by the HCl molecular weight.