Question

a. What condition must be met for an atomic group can act as a ligand in a complex relationship?
b. Discuss why some elements react with each other to form ionic compounds, while others provide covalent bonds.
c. Why is barium carbonate highly toxic if swallowed, while the barium sulphate is completely non-toxic, they can even be used as a contrast agent for x-rays of the stomach and intestine.
d. A person with mass 70 kg consume quickly a quantity of alcohol equivalent to 21 grams of pure ethanol. It is believed that the alcohol immediately fodeler evenly all over the person's band phase which forms 62% of the person's mass. Calculate ethanol mass alcohol levels (blood alcohol level)

Answer 1

A) for an atomic group to act as a ligand in a complex it should have pair of electron available for donations to central element.

B) ionic bonds are formed by complete transfer of electron from one element to other. It is possible between metal and non metal.

While covalent bonds are formed by sharing of electron it is possible between two non metal.

C) Barium carbonate react with HCl in stomach to form water soluble BaCl2 which results in toxic concentration of Ba2+.

BaSO4 dont react with HCl in stomach.