a standard solution of FeSC apling A standard solution of FeSCN2 is prepared by

Question

a standard solution of FeSC apling A standard solution of FeSCN2 is prepared by combining 9.0 mL of 0.20 M Fe(NOsh with 1.0 mL of 0.0020 M KSCN. The equation for the reaction is as follows. Fe NO,), + KSCN What allows us to assume that the reaction goes essentially to completion? O The concentration of Fe(NOsh is much higher than the concentration of KSCN. O The excess Fe prevents the formation of the neutral Fe(SCN)s O The reaction quotient Q is greater than Ko O Under the conditions given above, LeChatelier's principle dictates that the reaction shifts to the left. The equlibrium reaction has a very high KO Based on that assumption, what is the equilibrium concentration of FeSCN2 Number Tools x 10 Previous 0 Next Save And Exit

Explanation / Answer

1) answer : the equilibrium reaction has very high Kc

if Kc value is very high the reaction almost gets completed

if Kc value is low the reaction shifts to the left .

2)

moles of Fe (NO3)3   = 9 x 0.2 / 1000 = 0.0018 M

moles of KSCN = 1 x 0.0020 / 1000 = 2 x 10^-6 M

here limiting reagent is KSCN. so it is completely consumed.

the consumed concentration of KSCN is formed in the product side.

so

[FeSCN+2 ] = 2 x 10^-6 M

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.