Na3po4-6 Lab Report
The identities of cations and anions were determined by using solubility rules for ionic compounds. The mixing of solutions was classified if precipitate was present or absent. Cation A was determined as Ag+ and formed a precipitate in NaBr-, NaOH-, and Na3PO4-3. Cation B was Ba+2 because it formed precipitate in Na2SO4-2 and Na3PO4-3. Cation C was classified as Cu+2 not only because the solution was blue; but also it was insoluble in NaOH- and Na3PO4-3. Cation D was found as Fe+3 for its rustic color and insolubility in NaOH-, Na2SO4-2, and Na3PO4-3. Cation E was determined as K+ because it was soluble in every anion solution. Cation F, Mg2+, was only insoluble in Na3PO4-3. Pb+2, Cation G, formed precipitate in every anion solution. Anion
number 3 was classified as Br-PO4-3. This classification was made because when Cu+2 was added to the unknown solution, precipitate was made. After this reaction, the unknown substance could not contain. Br – or SO4-2. After Ba+2 was added to the unknown solution, the solution was insoluble. Ba+2 is soluble in OH- thus the unknown solution could not contain OH-. The only possible anion classification for unknown solution 3 was Br-PO4-3.
number 3 was classified as Br-PO4-3. This classification was made because when Cu+2 was added to the unknown solution, precipitate was made. After this reaction, the unknown substance could not contain. Br – or SO4-2. After Ba+2 was added to the unknown solution, the solution was insoluble. Ba+2 is soluble in OH- thus the unknown solution could not contain OH-. The only possible anion classification for unknown solution 3 was Br-PO4-3.