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Chemistry Experiment Outline: H2O, NaHSO4, MgCl2, CoCl2 - Prof. Patrick Desrochers, Study notes of Chemistry

An outline for a chemistry experiment involving the use of h2o, nahso4, mgcl2, and cocl2. The experiment includes steps for adding various solutions and observing changes in the presence of indicators thymol blue and phenolphthalein. The document also includes the expected chemical reactions.

Typology: Study notes

Pre 2010

Uploaded on 08/19/2009

koofers-user-r69
koofers-user-r69 🇺🇸

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Cl
Co
Cl ClCl
2-
blue
Co
H2O
H2O OH2
OH2
OH2
OH2
2+
pink
PRINT FROM YOUR PRINTER IN LANDSCAPE MODE
This table is designed as an outline for the experiment, but it is not designed to replace the published procedure
Numbers in parentheses refer to steps in the published procedure. Numbers in bold refer to drops of solution to add.
1 2 3 4 5
A(6) 10 NaHSO4(aq)
(7) thymol blue
(8) Na2SO4(aq)
(6) 10 NaHSO4(aq)
(7) thymol blue (6) 10 NaHSO4(aq)
(7) thymol blue
(9) NaHSO4(s)
(6) 10 NaHSO4(aq)
(7) thymol blue
(11-15) hot/cold
(6) 10 NaHSO4(aq)
(7) thymol blue
(11-15) hot/cold
B(22) 20 MgCl2(aq)
(24) 10 NaOH(aq)
(25) HCl(aq)
look for changes
in amount of ppt
(22) 20 MgCl2(aq)
(24) 10 NaOH(aq)
(26) Na4EDTA(aq)
(22) 20 MgCl2(aq)
(23) phenolphthalein
(24) 10 NaOH(aq)
(27-30) hot/cold
(22) 20 MgCl2(aq)
(23) phenolphthalein
(24) 10 NaOH(aq)
(27-30) hot/cold
C(35) 25 CoCl2(eth)
(36) H2O
(37) HCl(aq)
(38) AgNO3(aq)
(39) CoCl2(eth), H2O
(40) alcohol
(42) hot/cold
(41) CoCl2(eth)
(A) HSO4-(aq) + H2O(l) DH3O+(aq) + SO4-2(aq)
(B) Mg(OH)2(s) DMg+2(aq) + 2OH-(aq)
(C) CoCl4-2(aq) + 6H2O(l) D Co(OH2)6+2(aq) + 4Cl-(aq)
blue pink

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Cl

Co Cl (^) ClCl

2-

blue

Co H 2 O

H 2 O OH 2 OH 2

OH 2

OH 2

2+

pink

PRINT FROM YOUR PRINTER IN LANDSCAPE MODE

This table is designed as an outline for the experiment, but it is not designed to replace the published procedure Numbers in parentheses refer to steps in the published procedure. Numbers in bold refer to drops of solution to add. 1 2 3 4 5 A (6) 10 NaHSO 4 (aq) (7) thymol blue (8) Na 2 SO 4 (aq)

(6) 10 NaHSO 4 (aq) (7) thymol blue

(6) 10 NaHSO 4 (aq) (7) thymol blue (9) NaHSO 4 (s)

(6) 10 NaHSO 4 (aq) (7) thymol blue (11-15) hot/cold

(6) 10 NaHSO 4 (aq) (7) thymol blue (11-15) hot/cold

B (22) 20 MgCl 2 (aq) (24) 10 NaOH(aq) (25) HCl(aq)

look for changes in amount of ppt

(22) 20 MgCl 2 (aq) (24) 10 NaOH(aq) (26) Na 4 EDTA(aq)

(22) 20 MgCl 2 (aq) (23) phenolphthalein (24) 10 NaOH(aq) (27-30) hot/cold

(22) 20 MgCl 2 (aq) (23) phenolphthalein (24) 10 NaOH(aq) (27-30) hot/cold

C (35) 25 CoCl 2 (eth) (36) H 2 O (37) HCl(aq) (38) AgNO 3 (aq)

(39) CoCl 2 (eth), H 2 O (40) alcohol (42) hot/cold

(41) CoCl 2 (eth)

(A) HSO 4

(aq) + H 2 O(l) D H 3 O

(aq) + SO 4

(aq)

(B) Mg(OH) 2 (s) D Mg

(aq) + 2OH

(aq)

(C) CoCl 4

(aq) + 6H 2 O(l) D Co(OH 2 ) 6

(aq) + 4Cl

(aq)

blue pink