Question

Prelab The Mole in Chemical Formulas Name Mahboybah Ahmad Date 10 126/19 Section 192 1. Define the following terms: a. empirical formula The Simples? Whole number ratio of the elements to each other in that compound b. hydrate An ionic compound which crystallizes out of an aquow solu with for mor water attached to each others c. anhydrate formules unit of the compound Abydrate that lost its water 2. The molecular formula for dinitrogen tetraoxide is N, O. Is this the empirical formula for this compound? If this isn't the empirical formula, what would it be? NO - NO 3. Label each of the formulas shown in the following reactions as hydrates or anhydrates a. Caso, 2H,0 (s) house caso, (s) + 2H,0 (2) hydrate anhydrate b. COCI,- 6H,0 (s) buy COCI, (s) + 6H,0 (2) anhydrate hydrate PRELAB

Answer 1

1. a)The empirical formula of a compound is defined as the formula that shows the ratio of elements present in the compound, but not the actual numbers of atoms found in the molecule.

b) A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal is called hydrate.

c) Substances without water are labeled anhydrous. The term is most often applied to crystalline substances after the water of crystallization is removed.

2. N2O4 is not emperical formula.

Correct emperical formula would be : NO_{​​​​​2}

3. a)CuSO4.2H2O -> Hydrate

CuSO4 -> Anhydrate

b) CoCl2.6H2O -> Hydrate

CoCl2 -> Anhydrate