DATA/REPORT SIIEETS NAME SECTION DATE 3lsoja SYSTEM I O Color of the initial sod
ID: 501607 • Letter: D
Question
DATA/REPORT SIIEETS NAME SECTION DATE 3lsoja SYSTEM I O Color of the initial sodium dichromate solution. Orange Q Color of the solution aner the 20 drops ofNacH were added. ora color of the solution after the additional 10 drops of NaOH were added. yellow color the solution aner2o drops orHaso. were added very light oro 3) Color of the solution after 10 drops of H,so, were added. con dark l red) than the 6 Which reagents shifted the equilibrium preitinn to the right? Give evidence for your conclusi hich reagents shifted the position of equilibrium to the left? Give evidence to support your 7. Use the chemical equation to explain these shifts in terms of Le Chateliers principle. s SYSTEM II 1) Color of the initial FeCIs solution. lant aoge E color of the initial NHscN solution. aAere deaht colo/ Colomesu. color of the mixture of FeCls and NHSCN. Colone. y 4 Color change after additional FeCl3 was added. (Yet More Q Color change after additional NHscN was added. Sowe rel more t fou in O) Color change after the NH4CI was added and dissolved. orogExplanation / Answer
SYSTEM I
The equilibrium reaction is
Cr2O7-2 + H2O -----------> 2 CrO4-2 + 2H+
orange yellow
6) The equilibrium shifts to right when NaOH is added (shown by yellow)
7) equilibrium shifts to left when H2SO4 is added.
8) According to Lechatlier
when NaOH is added,[H+] decreases, one of the product H+ is removed as H+ +OH- ----> H2O . so more of forward reaction occurs to generate H+
When H2 SO4 is added [H+] increases so the equilibrium shifts to reduce it, that is left.
SYSTEM II
FeCL3 + NH4SCN <-----------> NH4Cl + Fe(SCN)+2
yellow colorless cololess red
8) the increase in red color shows [FeSCN+2] increases
9) increase in yelllow color show[FeCl3] increase.
10) The factors that shift equilibrium to right are addition of FeCL3 or NH4SCN(both reactants)
1) the factors that shift the equilibrium to left are addition of product NH4Cl.or FeSCn+2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.