Chemistry, 19.02.2020 04:26 drandbone92
A solution contains some or all of the ions Cu²⁺, Al³⁺, K⁺, Ca²⁺, Ba²⁺, Pb²⁺, and NH₄⁺. The following tests were performed, in order, on the solution.
1.Addition of 6 M HCl produced no reaction.
2.Addition of H₂S with 0.2 M HCl produced a black solid.
3.Addition of (NH₄)₂S produced a white solid.
4.Addition of (NH₄)₂HPO₄ in NH₃ produced no reaction.
5.The final supernatant when heated produced a purple flame.
Identify which of these ions were present in the solution (P), which were absent (A), and which were inconclusive (I)
a. Cu²⁺
b. Al³⁺
c. K⁺
d. Ca²⁺
e. Ba²⁺
f. Pb²⁺
g. NH₄⁺
Answers: 2
Chemistry, 22.06.2019 01:30
Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .
Answers: 3
A solution contains some or all of the ions Cu²⁺, Al³⁺, K⁺, Ca²⁺, Ba²⁺, Pb²⁺, and NH₄⁺. The followin...
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