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oxidation
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The pb k-egde xanes data reveals that pb is in a mixed valence state of pb4 plus and pb2 plus however in literature pb is claimed to be in pb2 plus state the pb 6s2 electrons hybridize with the o 2p?
The Pb K-egde Xanes data reveals that Pb is in a mixed valence state of Pb4+ and Pb2+. However in literature Pb is claimed to be in Pb2+ state. The Pb 6s2 electrons hybridize with the O 2p electrons to form strong covalent bonding which results in the relative displacement of Pb cage with respect to the O-octahedron. This results in increase ferroelectric properties of PbTiO3.However the question is that in the covalent state of the Pb2+ will it appear as Pb4+ state in the Pb K-edge? The reason argued here is that the Pb will lose the 6s2 electrons to form the bond and hence appear to be Pb4+. Hence the argument placed by this pool of thought is from the EXAFS data what appears to be Pb4+ is actually the covalently bonded Pb2+ while what appears to be Pb2+ is actually the ionic type Pb2+.What is the oxidation state of Pb and Ti in PbTiO3 ?
Why is lead chloride a powerful oxidizing agent?
The oxidation state 4+ is not stable in PbCl4; the reaction is:Pb4+ + 2 e---------Pb2+
Does Pb2 plus react with oxygen?
Yes. They react to form lead (II) oxide.
The reaction pbbr2s pb2 plus aq plus 2br-aq has reached saturation with concentrations pb2 plus equals 2.5 x 10-3 and br- equals 5.0 x 10-2 what is the value of ksp for pbbr2 at this temperatur?
6.3 x 10-6
What is the name for Pb2 plus and O2-?
Lead (IV) ion
What is the correct cell notation for the redox reaction 3Pb2 plus aq plus 2Cr s 3Pb s plus 2Cr3 plus aq?
Cr(s) | Cr3+(aq) Pb2+(aq) | Pb(s)
What is the symbol for lead ion?
Pb2+
What is the formula for plumbous ion?
Formula: Pb2+
What is the chemical formula for lead salt?
Pb2+
PbBr2 soluble in water?
It is very slightly soluble in water.In a saturated solution:[Pb2+] = 1.2x10-2 mol/L[Br-] = 2.4x10-2 mol/Lbecause [Pb2+]*[Br-]2 = Ks = 6.3*10-6 and [Br-] = 2*[Pb2+]
What is the oxidation number of carbon in PbCO3?
in Pb3O4 the oxygen has an oxidation number of -2, the average oxidation number is a fraction (+8/3) so this must be a mixed oxidation sate compound. Teh two common Ox numbers of Pb are +2 and +4. the only way to make +8 overall is to have one Pb4+ and two Pb2+ This compound is a lovely red colour and is often called "red lead". Full marks to teacher - this is a tricky question!
What is mean by PBM in mass transfer?
It is the log mean value of the inert B in counterdiffusion usually used to find a flux. P = pA1 + pB1 = pA2 + pB2 thus, pB1 = P - pA1, and pB2 = P - pA2, so: pBM = [pB2 - pB1]/ln(pB2/pB1) = [pA1 - pA2]/ln[(P-pA2)/(P-pA1)] happy engineering :)
