Question

Допоможіть, благаюВизначити масову частку безводної солі в гіпсі, кальцій сульфат дигідрат​

Answer 1

Determining the Mass Fraction of Anhydrous Salt in Gypsum (Calcium Sulfate Dihydrate)

To determine the mass fraction of anhydrous salt in gypsum (calcium sulfate dihydrate), we can use the concept of the molar mass and the chemical formula of gypsum.

Chemical Formula of Gypsum: The chemical formula of gypsum, also known as calcium sulfate dihydrate, is CaSO4·2H2O. This means that each unit of gypsum contains one calcium atom (Ca), one sulfur atom (S), four oxygen atoms (O), and two water molecules (2H2O).

Steps to Calculate the Mass Fraction of Anhydrous Salt: 1. Calculate the molar mass of the entire gypsum compound. 2. Calculate the molar mass of the anhydrous salt (calcium sulfate without the water molecules). 3. Use the molar masses to determine the mass fraction of the anhydrous salt in gypsum.

Calculation: 1. Molar Mass of Gypsum (CaSO4·2H2O): - Calcium (Ca) molar mass = 40.08 g/mol - Sulfur (S) molar mass = 32.06 g/mol - Oxygen (O) molar mass = 16.00 g/mol - Water (H2O) molar mass = 18.02 g/mol - Molar mass of gypsum = (40.08 + 32.06 + 4*16.00 + 2*18.02) g/mol

2. Molar Mass of Anhydrous Salt (CaSO4): - Calcium (Ca) molar mass = 40.08 g/mol - Sulfur (S) molar mass = 32.06 g/mol - Oxygen (O) molar mass = 16.00 g/mol - Molar mass of anhydrous salt (calcium sulfate) = (40.08 + 32.06 + 4*16.00) g/mol

3. Mass Fraction of Anhydrous Salt in Gypsum: - Mass fraction = (Molar mass of anhydrous salt / Molar mass of gypsum) * 100%

By using the molar masses and the given chemical formula, we can calculate the mass fraction of the anhydrous salt in gypsum.

Let's proceed with the calculations.