Molar Mass of Copper(II) chloride
CuCl2 — 134.446 g/mol, worked out element by element.
Molar mass of Copper(II) chloride, CuCl₂
134.446 g/mol
Molecular weight 134.446 · 3 atoms per formula unit
Also known as: cucl2, cupric chloride.
Gives a blue-green flame test, and shifts colour with chloride concentration — a visible equilibrium.
How 134.446 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Chlorine | 2 | 35.45 | 70.900 | 52.73% |
| Copper | 1 | 63.546 | 63.546 | 47.27% |
| Total | 3 | 134.446 | 100% |
M = 2 × 35.450 + 1 × 63.546 = 134.446 g/mol
Grams to moles for Copper(II) chloride
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0074 mol | 4.479 × 10^21 |
| 10 g | 0.0744 mol | 4.479 × 10^22 |
| 25 g | 0.1859 mol | 1.120 × 10^23 |
| 50 g | 0.3719 mol | 2.240 × 10^23 |
| 100 g | 0.7438 mol | 4.479 × 10^23 |
| 250 g | 1.8595 mol | 1.120 × 10^24 |
| 134.446 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
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Frequently Asked Questions
What is the molar mass of Copper(II) chloride?
The molar mass of Copper(II) chloride (CuCl2) is 134.446 g/mol. That is the sum of the standard atomic weights of all 3 atoms in one formula unit: 2 × 35.450 + 1 × 63.546 = 134.446.
What is the molecular weight of Copper(II) chloride?
134.446 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 134.45 and a molar mass of 134.45 g/mol are the same answer.
How many moles are in 100 g of Copper(II) chloride?
100 ÷ 134.446 = 0.7438 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Copper(II) chloride?
By mass, Copper(II) chloride is 52.73% chlorine, 47.27% copper. Each element's share is its total mass in the formula divided by 134.446.
How many atoms are in one formula unit of Copper(II) chloride?
3: 2 chlorine, 1 copper. One mole contains 6.02214076 × 10²³ formula units, so a mole of Copper(II) chloride contains 3 × 6.022 × 10²³ atoms in total.