Determine the concentration of the cation and anion in each aqueous solution. (Assume complete dissociation of...

Question

Question

Determine the concentration of the cation and anion in each aqueous solution. (Assume complete dissociation of each compound.)

Part A 0.24 M Na2SO4

Part B 0.15 M K2CO3

Part C 0.13 M RbBr

science chemistry

Answer 1

Answer #1

A)
Na2SO4 dissociates as:
Na2SO4 -> 2 Na+ + SO42-

[Na+] = 2*[Na2SO4]
= 2*0.24 M
= 0.48 M

[SO42-] = [Na2SO4]
= 0.24 M

Answer:
[Na+] = 0.48 M
[SO42-] = 0.24 M

B)
K2CO3 dissociates as:
K2CO3 -> 2 K+ + CO32-

[K+] = 2*[K2CO3]
= 2*0.15 M
= 0.30 M

[CO32-] = [K2CO3]
= 0.15 M

Answer:
[K+] = 0.30 M
[CO32-] = 0.15 M

C)
RbBr dissociates as:
RbBr -> Rb+ + Br-

[Rb+] = [RbBr]
= 0.13 M

[Br-] = [RbBr]
= 0.13 M

Answer:
[Rb+] = 0.13 M
[Br-] = 0.13 M

Answer 2

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