Question

Which statement is most likely to be true for astatine, which is below iodine in Group VII of the
Periodic Table?
A Astatine and aqueous potassium chloride react to form aqueous potassium astatide and
chlorine.
B Potassium astatide and hot dilute sulphuric acid react to form white fumes of only hydrogen
astatide.
C Silver astatide reacts with dilute aqueous ammonia in excess to form a solution of a soluble
complex.
D Sodium astatide and hot concentrated sulphuric acid react to form astatine

Answer 1

can anyone explain why is it not A or B or C but its D
is there any reasoning behind it or is it just pure memorization?

Answer 2

A is not right because Astatine cannot displace chlorine as it is below chlorine in seventh group umm thats all i got

Answer 3

Just reviewed my notes and it says AgCl ios soluble, AgBr sparingly soluble and AgI is insolouble in NH3 by following the pattern silver Astatide must be insoluble ion dilute nh3 C is wrong

Answer 4

*in not ion

Answer 5

Thankyou!

Answer 6

:) no problem i got stuck on the same question i just memorised it :p

Answer 7

Hahah lol, its a confusing question, but you're explanation helped alot

Answer 8

Oh and for B i just realised that hydrogen astatide cannot be the ionly product sulopher and oxygen has to fit some where so there B is wrong too B|

Answer 9

Hahaha lol, i did the same for B and was left with C and D so i just chose C xD