MASS AND VOLUME PERCENT

Concentration Units

CHEMISTRY II

MASS AND VOLUME PERCENT

mISS handy berenice armenta rivera

2nd. grade

VOLUME PERCENT

The volume percent is used to express the concentration of a solution when the volume of a solute and the volume of a solution is given:

The mass percent is used to express the concentration of a solution when the mass of a solute and the mass of a solution is given:

MASS PERCENT

FORMULAS

1.- El vinagre es una disolución de ácido acético en agua. Al preparar 750 mL de un vinagre se utilizaron 37.5 mL de ácido acético. Determinar el porciento en volumen de ácido acético.

Calcula el % m/m de una solución que tiene 6 gramos de soluto en 80 gramos de disolución.

Calcula la masa de soluto que tendría una disolución de 220 gr. que es 4% m/m.

Se requiere preparar 8.00 L de solución fisiológica de cloruro de sodio. Calcula la masa de sal que se necesita para una solución al 36%.

¿Cuántos gramos de soluto tendrán 2400ml de solución cuya concentración es de 8% m/v.?

¿Cuáles son los volúmenes del soluto y solvente de una solución de 4000 ml al 16 % v/v?

If you have 1500g of bleach and the percent by mass of bleach is 3.62%, then what is the mass of NaOCl in the solution?

Activity

"A solution is prepared by dissolving 45 dL of hydrogen peroxide in enough water to make 5020 mL of solution. Identify the concentration of the hydrogen peroxide solution."

a) Search the formula of hydrogen peroxide.b) Transform "dL" to "mL" c) Express the concentration in %V/V d) Search what is the application of volume and mass percent in the industry.

Parts per million

Used to measure the concentration of a contaminant in soils and sediments.

1 ppm equals 1 mg of substance per kg of solid (mg/kg)

Formula

ppm

Toxicity

The U.S. Food and Drug Administration (FDA), the Environmental Protection Agency (EPA), States, and Tribes are issuing Fish Consumption Advisories. The FDA has set a limit of 1 part per million of mercury in fish for human consumption. Although most fish species contain mercury concentrations of 0.01 to 0.5 ppm, some predator fish, particularly swordfish, shark, and some species of large tuna exceed this limit.

life problem

+ info

EXERCISES

Let us consider a solution of 375 mL. How to calculate ppm (parts per million) for a solute of 6.3 x 10-3 g.

+ info

Suppose 17 grams of sucrose is dissolved in 183 grams of water. What is the concentration of sucrose in ppm?

+ info

A 900.0 g sample of sea water is found to contain 6.7 x 10-3 g Zn. Express this concentration in ppm

¡Eureka!

What is the total mass of solute in 1000. grams of a solution having a concentration of 8 parts per million?

What is the concentration of O2(g), in parts per million, in a solution that contains 0.003 gram of O2(g) dissolved in 100 grams of H2O(l)?

+ info