Tin and lead, Chemistry

Assignment Help:

 

GROUP 14: TIN AND LEAD

Tin and lead give some resemblance to the lighter elements in group 14, especially Ge. Although they are uniquely more metallic in their physical and chemical characteristics, simple cationic chemistry is the exception rather than the rule. As with group 13, two oxidation states MIV and MII are found, the MII form giving more stable for lead.

Both substances have rather low abundance, but are commoner than other heavy metals. They occur in the minerals galena PbS and cassiterite SnO2. They each have various stable isotopes, Sn more than any other element (10). Some Pb isotopes are discovered from the radioactive decay of uranium and thorium. The isotopic composition of Pb (and thus its atomic mass) differs detectably according to the source, and such variations have been used to estimate the age the Earth of and of rocks.

The elements are readily made by reduction of their ores and are soft, low-melting, somewhat unreactive metals. Tin is required for plating, and both elements in low-melting alloys and as many elements. Applications of lead are declining as its substances are very toxic. A continuing major need is in leadacid batteries, which depend on two reactions involving the PbII, Pb0 and PbIV states:

 

988_Untitled.png

Occurring at different electrodes, these show a cell potential of 2 V, greater than can be obtained easily from any other pair of electrode reactions in aqueous solution


Related Discussions:- Tin and lead

Rate theory, what are postulates of rate theory?

what are postulates of rate theory?

Dienes - hydrocarbon, Dienes - Hydrocarbon These are hydrocarbon along ...

Dienes - Hydrocarbon These are hydrocarbon along with two carbon-carbon double bonds. Dienes are of three forms (a) Conjugated dienes: Double bonds are seperated through one

Inorganic, Ask question #Msend your questions inimum 100 words accepted#

Ask question #Msend your questions inimum 100 words accepted#

Law of crystallography, how law of crystallography helps in the study of cr...

how law of crystallography helps in the study of crystal structure

Periodic trends, what can you deduce about the relationship between ionizat...

what can you deduce about the relationship between ionization energy and reactivity of metals

Eukaryotes vs prokaryotes-methylation of dna , 1. Acetylation of key protei...

1. Acetylation of key proteins is known to correlate with the gene expression in eukaryotes. What class of chromatin proteins is modified? What is the chemical nature of the acetyl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd