L= Large M=medium S= small PPT=Precitate REPORT REACTION TYPES, EQUATIONS AND QU

Question

L= Large M=medium S= small PPT=Precitate REPORT REACTION TYPES, EQUATIONS AND QUALITATIVE ANALvsls Date: Student Name Lab Day: A. Qualitative analysis of known solutions (spot testing) Table 1: Report final colour, then (ii) state either precipitate (ppt) and amount, or colour change (cc), or no reaction (NR) (2 marks) Reagent added Test Test Solution Haso. Kacro. KSCN NH, (aq) DMG HCI white White WHITE yellow White White Fe' PPT L cc L PPT s PPT M PPT s PPT s Yellow Orange YELLOW YELLOW Orange Blood red Nickel (ll) Nitrate ORANGE Blue PURPLE PINK NR Ag PPT L PPT L PPT L PPT L NR Blood red WHITE NR Ba' PPT light yellow NR WHITE NR WHITE Negative Control Unknown Sample Unknown Sample N: dentity of Unknown Cations

Explanation / Answer

a)

Ag+ is possibly there, since it will precipitate with HCl in acidic media, but we can't be sure since Pb+2 could also have precipitated

b)

Pb+2 is possibly there, since it will precipitate with HCl in acidic media, but we can't be sure since Ag+ could also have precipitated

c)

Not likely, since Additon of CrO4- ions did nt formed preicptiates, i.e.

(CH3COO)2Ba + K2CrO4 = BaCrO4(s)

d)

not likly since Ni2+ should hav eprecpiitated when ammonia was added

Related Questions

Navigate

• Browse (All)
• Browse L
• Subjects

---

---

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