IIT JEE , AIEEE Forum - Chemistry , Organic Chemistry

jv604

1.why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding??

2.Chromium grp elements have the highest melting point in their respective series?explain.

please replyy.

joyfrancis

High number of unpaired electrons increase the metlting point of an element to to increase in cohesiveness. Although Mn has the highest number of unpaired electrons in the 3d series, it doesnot have the highest mp because Mn forms a weak and broken crystal lattice whose melting point isn't as high as chromium's.
Hence, Cr and Cr group elements have highest mp.

paddy.dude

ferric chloride is preferred coz it has higher power to cause coagulation of blood as its in +3 state where as k is in +1 state........

rate me if useful

spideyunlimited

According to hardy schulze rule, the coagulating power of an ion increases with its oxidation state /charge, and ferric chloride has more coagulating power which makes it favourable to be used in case of a bleeding wound.

joyfrancis

Coagulation power of a compound is proprtional to the fourth power of charge(hardy-shulze rule). Fe has +3 and K has +1, hence more efective blood coagulation would take place with FeCl3.

nadeemoidu

According to hardy schulze rule , positive ions help in coagulating negative sols and vice versa. but blood ( haemoglobin) is a positive sol . so it should be coagulated by negative ions. so in FeCl3 and KCl , the anion is same , so the coagulating power should be the same . then why is FeCl3 preferred?

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