experiment 10 [Read-Onlyl-Word ngs R Review View Design Layout a D 1 Normal 1 No

Question

experiment 10 [Read-Onlyl-Word ngs R Review View Design Layout a D 1 Normal 1 No Spac.. Heading 1 Heading 2 Title S 1 Normal 1No Spac Subtitle Subtle Em. Empha E Heading i Heading Paragraph Our table Please continue Stress: Too much H. Response: The equilibrium shifts to the left to consume the extra Ht. The a drop of 1 M Ha-tube #1 Solution turned from pink to colorles concentration of the pink species decreases, while the concentration of the colorless species increases. Please continue 3 drops of 1 M NaOH to HCl Solution turned from tube #1 +1 drop of phenolphthalein Nothing happened Ti12 a drop of 1 M NaHTube#2 Solution turned to purple Reddish pink to Yellow +3 drops of Hg Tube #2 | +1 drop of Methyl oranSolution turned to reddish +spatula of Sodium acetate Solution changed to an +10drops of 12 M HCI to Cocl2 Solution turned to light + more drops of 12 M HCI Solution turned to dark blue +more drops of distilled water Solution turned to pinkish- Solution turned from purple to clear orange purple,pinkish color light purple

Explanation / Answer

1 Addition of NaOH to HCl results in neutralization reaction. H+ will be consumed by OH- ions and equllibrium shifts towards right. The pH of the system also increases. 2 It is a colorless compound. Addition of phenophthalein to the system of pH 0-8.2 or above 13 would not result in any color change. 3 NaOH is strong base. When base added to the phenophethalein, equillibrium moves towards right and gives purple color. 4 HCl is strong acid. NaOH and HCl undergo neutralization reaction and nullifies the effect of both acid and base. Solution pH will comesdown to below 8.2. So, solution becomes clear. 5 Methyl orange is a pH indicator. It does not affect the equillibrium. Color change indicates that solution is in acidic medium. 6 sodium acetate is slightly basic when added to the solution. H+ ions will be consumed and equillibrium will shift towards right. Color change indicates that pH of the system increased. 7 When cl- ion concentration is less, Cobalt in aqueous slotion gives pinkish color by forming hydrated cobalt salt. 8 with increasing the Cl- ion cocncentration, cobalt salt changes to (CoCl4)^(-2) ion. This gives blue color to the solution 9 addition of water decreases the Cl- ion concentartion.So system return to its intial state.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

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