Search results
Results from the WOW.Com Content Network
Lead(IV) hydroxide, Pb(OH) 4, also called ortho-plumbic acid, is the notional conjugate acid of the ortho-plumbate(IV) ion, PbO 4− 4, found in compounds such as calcium orthoplumbate, Ca 2 PbO 4. [ citation needed ] Like its tin analog Sn(OH) 4 , Pb(OH) 4 has not been isolated.
In aqueous solution, lead(II) hydroxide is a somewhat weak base, forming lead(II) ion, Pb 2+, under weakly acidic conditions. This cation hydrolyzes and, under progressively increasing alkaline conditions, it becomes somewhat weak acid, and it forms Pb(OH) +, Pb(OH) 2 (aqueous), Pb(OH) − 3, and other species, including several polynuclear species, e.g., Pb 4 (OH) 4+ 4, Pb 3 (OH) 2+ 4, Pb 6 O ...
The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol = 1 g/mol. For normal samples from earth with typical isotope composition, the atomic weight can be approximated by the standard atomic weight [ 2 ] or the conventional atomic weight.
C(OH) 4 → HCO − 3 + H 3 O + HCO − 3 + H + ⇌ H 2 CO 3. Carbon dioxide is also known as carbonic anhydride, meaning that it forms by dehydration of carbonic acid H 2 CO 3 (OC(OH) 2). [23] Silicic acid is the name given to a variety of compounds with a generic formula [SiO x (OH) 4−2x] n. [24] [25] Orthosilicic acid has been identified ...
PbO 2 + 2 OH − + 2 H 2 O → Pb(OH) 2− 6. Lead also has an oxide with mixed +2 and +4 oxidation states, red lead (Pb 3 O 4), also known as minium. Lead readily forms an equimolar alloy with sodium metal that reacts with alkyl halides to form organometallic compounds of lead such as tetraethyllead. [4]
Lead chromate adopts the monazite structure, meaning that the connectivity of the atoms is very similar to other compounds of the type MM'O 4. Pb(II) has a distorted coordination sphere being surrounded by eight oxides with Pb-O distances ranging from 2.53 to 2.80 Å. The chromate anion is tetrahedral, as usual. [3]
Lead(II) phosphate is an ionic compound with chemical formula Pb 3 (P O 4) 2. Lead(II) phosphate is a long-lived electronically neutral reagent chemical. [2] Despite limited tests on humans, it has been identified as a carcinogen based on tests on animals conducted by the EPA. [3] Lead(II) phosphate appears as hexagonal, colorless crystals or ...
Lead carbonate is manufactured by passing carbon dioxide into a cold dilute solution of lead(II) acetate, or by shaking a suspension of a lead salt more soluble than the carbonate with ammonium carbonate at a low temperature to avoid formation of basic lead carbonate. [2] Pb(CH 3 COO) 2 + [NH 4] 2 CO 3 → PbCO 3 + 2 [NH 4](CH 3 COO)