Q2/ The aluminum content of an alloy is determined gravimetrically by precipi- tating it with 8-hydroxyquinoline (oxine) to give Al(C,H,ON)3. If a 1.021-g sample yielded 0.1862 g of precipitate. what is the percent aluminum in the alloy?

Q2/ The aluminum content of an alloy is determined gravimetrically by precipi- tating it with 8-hydroxyquinoline (oxine) to give Al(C,H,ON)3. If a 1.021-g sample yielded 0.1862 g of precipitate. what is the percent aluminum in the alloy?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

icel Chiemistry
nalytical Chemistry
Sheet No. 2
What weight of pyrite ore (impure FeS,) must be taken for analysis so that the
BASO, precipitate weight obtained will be equal to one-half that of the percent S
in the sample? NAr
Q2/
The aluminum content of an alloy is determined gravimetrically by precipi-
tating it with 8-hydroxyquinoline (oxine) to give Al(C,H,ON). If a 1.021-g
sample yielded 0.1862 g of precipitate. what is the percent aluminum in the
alloy?
Q3/
A mixture containing only BaO and CaO weighs 2.00 g. The oxides are con-
verted to the corresponding mixed sulfates, which weigh 4.00 g. Calculate the
percent Ba and Ca in the original mixture.
04/ A sample of 0.676g of an unknown compound containing barium jons
excess of NazSO4. If the mass
(Ba) is dissolved in water and treated with
the original unknown compound?

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Several alloys that contained only silver and copper were analyzed by dissolving weighed quantities in nitric acid, introducing an excess of iodate ions, and bringing the filtered mixture of silver iodate and copper (II) iodate to constant mass. Calculate the percentage composition of the alloy if 0.8165 alloy sample gives 2.176 gram of precipitate. %Ag %Cu
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Number 3.