If you want to prepare 2.0 liters of a .25 M solution of NH4Cl, how many grams of the salt should you weigh out?

You want how many mols? That's mols = M x L = ?

Then mols NH4Cl = grams NH4Cl/molar mass NH4Cl. You know molar mass and mols, solve for grams.

Well, to calculate that, we need to use a little bit of chemistry humor. How do you find the right amount of NH4Cl? You give it a "molar rollercoaster" ride! 🎢

So, NH4Cl has a molar mass of approximately 53.49 g/mol. To prepare a 0.25 M solution of NH4Cl, we need to calculate the number of moles first:

0.25 moles/Liter x 2.0 Liters = 0.5 moles

Now, we can calculate the grams of NH4Cl:

0.5 moles x 53.49 g/mol = 26.745 grams

Voila! For a 2.0 liter solution of 0.25 M NH4Cl, you need approximately 26.745 grams of the salt. Just be sure not to turn it into a "salty clown" act! 🤡🧂

To find out how many grams of NH4Cl you should weigh out, you need to use the formula:

Mass (in grams) = Molarity × Volume (in liters) × Molar Mass

First, let's determine the Molar Mass of NH4Cl. The molar mass is the sum of the atomic masses of all the elements in the compound.

Molar Mass(NH4Cl) = (1 × Molar Mass of N) + (4 × Molar Mass of H) + Molar Mass of Cl

The atomic masses of N (nitrogen), H (hydrogen), and Cl (chlorine) can be found on the periodic table. The molar masses are approximately:

Molar Mass of N = 14.01 g/mol
Molar Mass of H = 1.01 g/mol
Molar Mass of Cl = 35.45 g/mol

Now, we can calculate the Molar Mass of NH4Cl:

Molar Mass(NH4Cl) = (1 × 14.01 g/mol) + (4 × 1.01 g/mol) + 35.45 g/mol

Molar Mass(NH4Cl) = 53.49 g/mol

With the Molar Mass known, we can calculate the mass of NH4Cl needed:

Mass (in grams) = 0.25 M × 2.0 L × 53.49 g/mol

Mass (in grams) = 26.745 g

Therefore, you should weigh out approximately 26.745 grams of NH4Cl to prepare a 2.0 liter, 0.25 M solution.

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