Molar Mass of CuSO₄·₅H₂O
Copper(II) sulfate pentahydrate (blue vitriol). The five waters of crystallisation add 5 × 18.015 g/mol to the anhydrous salt.
Molar mass of CuSO4·5H2O
249.682 g/mol
1 × 63.546 + 1 × 32.065 + 9 × 15.999 + 10 × 1.008 = 249.682
Calculation, element by element
| Element | Atoms | Atomic mass (g/mol) | Subtotal | Mass % |
|---|---|---|---|---|
| Copper (Cu) | 1 | 63.546 | 63.546 | 25.45% |
| Sulfur (S) | 1 | 32.065 | 32.065 | 12.84% |
| Oxygen (O) | 9 | 15.999 | 143.991 | 57.67% |
| Hydrogen (H) | 10 | 1.008 | 10.080 | 4.04% |
| Total | 249.682 | 100% |
= 0.040051 mol = 2.4119 × 1022 formula units
CuSO₄·₅H₂O molar mass FAQ
What is the molar mass of copper(ii) sulfate pentahydrate (CuSO₄·₅H₂O)?
249.682 g/mol. It is the sum of the atomic masses of every atom in the formula: 1 × 63.546 + 1 × 32.065 + 9 × 15.999 + 10 × 1.008 = 249.682 g/mol.
How many grams are in one mole of CuSO₄·₅H₂O?
249.682 g. Molar mass is the mass of one mole (6.022 × 10²³ formula units), so 1 mol of CuSO₄·₅H₂O weighs 249.682 g and 0.5 mol weighs 124.841 g.
How many moles are in 10 g of CuSO₄·₅H₂O?
10 g ÷ 249.682 g/mol = 0.04005 mol.
What is the percent composition of CuSO₄·₅H₂O?
Copper 25.45%, Sulfur 12.84%, Oxygen 57.67%, Hydrogen 4.04%.
Is molecular weight the same as molar mass for CuSO₄·₅H₂O?
Numerically yes: the molecular (or formula) weight is 249.682 u per formula unit, and the molar mass is 249.682 g/mol.
Molar masses of other common compounds
H2O WaterNaCl Sodium chlorideNaOH Sodium hydroxideC6H12O6 GlucoseCO2 Carbon dioxideHCl Hydrochloric acidH2SO4 Sulfuric acidO2 Oxygen gasCaCO3 Calcium carbonateC2H5OH EthanolNH3 AmmoniaN2 Nitrogen gasCH4 MethaneCuSO4 Copper(II) sulfateKMnO4 Potassium permanganateMgCl2 Magnesium chlorideNaHCO3 Sodium bicarbonateNa2CO3 Sodium carbonateKCl Potassium chlorideHNO3 Nitric acidH3PO4 Phosphoric acidCH3COOH Acetic acidC12H22O11 SucroseH2O2 Hydrogen peroxideCa(OH)2 Calcium hydroxideFe2O3 Iron(III) oxideAl2O3 Aluminium oxideAgNO3 Silver nitrateNH4NO3 Ammonium nitrateC8H10N4O2 CaffeineC9H8O4 AspirinC3H8 PropaneC8H18 OctaneH2 Hydrogen gasCl2 Chlorine gasO3 OzoneCO Carbon monoxideSO2 Sulfur dioxideKOH Potassium hydroxideMgO Magnesium oxideCaCl2 Calcium chlorideNaNO3 Sodium nitrateK2Cr2O7 Potassium dichromateBaSO4 Barium sulfate