What is the molarity (moles per liter) of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution?
How do I convert the 80grams into mols?
1.14 moles
To convert the mass of a substance into moles, you need to use the formula:
moles = mass (in grams) / molar mass
First, you need to find the molar mass of sodium hydroxide, NaOH.
The molar mass of sodium (Na) is 22.99 g/mol, the molar mass of oxygen (O) is 16.00 g/mol, and the molar mass of hydrogen (H) is 1.01 g/mol.
So, the molar mass of NaOH is:
(22.99 g/mol) + (1.01 g/mol) + (16.00 g/mol) = 40.00 g/mol
Now, you can calculate the moles of NaOH:
moles = 80 grams / 40.00 g/mol = 2 moles
Therefore, there are 2 moles of NaOH in 80 grams.
To convert grams to moles, you need to use the molar mass of the substance, which can be calculated by adding together the atomic masses of the elements in the formula of the substance. In this case, the formula for sodium hydroxide is NaOH.
The atomic masses can be found on the periodic table. The atomic mass of sodium (Na) is approximately 23 grams per mole, and the atomic mass of oxygen (O) is approximately 16 grams per mole, while the atomic mass of hydrogen (H) is approximately 1 gram per mole.
So, to calculate the molar mass of sodium hydroxide, you add the atomic masses:
Na(23) + O(16) + H(1) = 40 grams per mole.
Now that we know the molar mass of sodium hydroxide is 40 grams per mole, we can convert the given mass of 80 grams into moles using the formula:
moles = mass / molar mass
Thus, the moles of sodium hydroxide can be calculated as:
moles = 80 grams / 40 grams per mole = 2 moles
Therefore, 80 grams of sodium hydroxide is equivalent to 2 moles