Molar Mass of Pb(OH)2 (Lead(II) Hydroxide)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of Pb(OH)2?

Answer

M(Pb(OH)2) ≈
241.2 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Pb: 207.2.

Pb(OH)2 = Pb + 2 × (O + H) → Pb 1, O 2, H 2

Contribution of each element
Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
Pblead1207.2207.2 w ≈ 85.90%
Ooxygen215.99931.998 w ≈ 13.27%
Hhydrogen21.00802.0160 w ≈ 0.84%
Σ = 241.214 ≈ 241.2 g/mol w = 100%

Each fraction is rounded on its own, so the printed ones add up to 100.01%; unrounded, they make exactly 100%.

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

O 13.27%H 0.84%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
U (uranium)238.03
PbO₂ (lead dioxide)239.2
PbS (lead(II) sulfide)239.3
Pb(OH)₂ (lead(II) hydroxide)241.2
Fe(NO₃)₃ (ferric nitrate)241.857
BaCl₂·2H₂O (barium chloride dihydrate)244.26
C₁₀H₁₆N₂O₃S (biotin)244.31

FAQ

What is the molar mass of Pb(OH)2?

M(Pb(OH)₂) ≈ 241.2 g/mol

How to calculate the molar mass of Pb(OH)₂?

Add up the atomic weights of all the atoms in the formula: 207.2 + 2 × 15.999 + 2 × 1.0080 = 241.214 ≈ 241.2 g/mol.

How many grams are in 2 moles of Pb(OH)₂?

m = n × M = 2 mol × 241.2 g/mol = 482.4 g.

See Also