Wednesday, July 24, 2019
Sunday, July 21, 2019
Friday, July 19, 2019
GROUP ASSIGNMENT DK014 2019
THE MYSTERIOUS CASE : CHEMISTRY OF ISABELLA
This assignment was locked 1 st, August 2019 at 11:59am.
The main purpose of this assignment is to give you practice in solving MOLE CONCEPT problems.
Instructions Assignment
This assignment was locked 1 st, August 2019 at 11:59am.
The main purpose of this assignment is to give you practice in solving MOLE CONCEPT problems.
Instructions Assignment
- There are 2 assignment to do. Molarity Presentation (Must be performed in class (within 15 minutes) and Mole Concept assignment.
- Based on what you have learned in class thus far, and on more outside resources, completing the given table in the worksheet given. You are expected to consult outside sources, that is to get better presentation and report.
- You're allowed to choose your own group members. (4 members)
- DOWNLOAD the assignment here:-⇩
C4: OXIDATION NUMBER
EXERCISE :
Determine the oxidation
number of all elements in the following compounds:
1. N
2. N2
3. N-3
4. Be+2
5. F2
6. Mg
7. CH4
8. CO2
9. N2O5
10. Li4C
11. SO3
12. Na2O
13. Cl-
14. PO4-3
15. N2O3
16. NO
17. P2O4
18. NO2
19. NH4+
20. NO3-
21. OF2
22. H2O2
23. Na2O2
24. KNO3
25. NH4NO3
26. H2CO3
27. K3PO4
28. Al(NO3)3
29. (NH4)2SO4
30. K2Cr2O7
31. KMnO4
32. Fe2O3
33. FeO
34. UO2F2
35. MnO
36. K2O
37. CO3-2
38. KClO4
39. MnO4-
40. Al2(SO4)3
C4: BALANCE EQUATION ( INSPECTION METHODE )
EXERCISES
1.
H2 + O2
→ H2O
2.
N2 + H2
→ NH3
3.
HCl + KOH → KCl +
HOH
4.
NaOH + H2SO4
→ Na2SO4 + H2O
5.
NH4OH +
H3PO4 → (NH4)3PO4
+ H2O
6.
P2 + O2
→ P2O5
7. Al(OH)3
+ H2CO3 → Al2(CO3)3 + H2O
8.
Mg + O2
→ MgO
9.
Cr2O3
+ C → CO2 + Cr
10. Al2 + O2 → Al2O3
11. S + O2
→ SO3
12. Al + Cl2 → AlCl3
13. Li3N
→ Li + N2
14. BCl3 + H2O → H3BO3 + HCl
15. BaCl2 + Na3PO4 → Ba3(PO4)2
+ NaCl
16. Fe(OH)3
+ K2SO4 → Fe2(SO4)3
+ KOH
17. Mg + FeBr3
→ MgBr2 + Fe
18. Al + HCl → AlCl3
+ H2
19. Na + NiCl2
→ NaCl + Ni
20. Ca + Zn(NO3)2 → Ca(NO3)2 + Zn
21. Ba +
CuCl → BaCl2 + Cu
22. K +
Ni2(SO4)3 → K2SO4 + Ni
23. AlBr3 + Na2S → Al2S3
+ NaBr
24. BaCl2 + Na2SO4 → BaSO4
+ NaCl
25. K2S + Pb(NO3)2 → KNO3 + PbS
26. Cu2CO3 + Mg3(PO4)2→Cu3PO4
+MgCO3
27. Al(OH)3 + Na2CO3 → Al2(CO3)3
+ NaOH
28. Ca(NO3)2 + K3PO4→ Ca3(PO4)2 +
KNO3
29. Fe(NO3)3 + Na2CO3
→Fe2(CO3)3+ NaNO3
30. K2SO4
+ Cr(OH)3 → KOH + Cr2(SO4)3
ANSWER
ANSWER
Tuesday, July 16, 2019
Sunday, July 14, 2019
PRECAUTIONS IN TITRATION:
1)Usually an air bubble is present in the nozzle of the burette,it must be removed before taking the initial reading.
2)Their should not be any leakage from the burette during titration.
3)Keep your eye in level with the liquid surface while taking the burette reading or while reading the pipette or measuring flask etc.
4)Always read lower meniscus in case of colourless solution and upper meniscus in case of coloured solutions.
5)Do not blow through the pipette tp expel the last drop of solution from it,simply touch the inner surface of the titration flask with the nozzle of the pipette for this purpose.
6)shaking of the titration flask should be continous during adding the solution from the burette.
7)Use your index finger while pipetting the solution.
8)Do not waste your time in bringing the burette reading to zero before each titration.
Some important things to remember while doing titration.
1. Always add acid to water not water to acid. Same goes for basic reagents.
2. Read from the lower meniscus.
3. Do not let the acid or base level in the burette reach zero.
4. Wear protective equipment: gloves, goggles, lab gown etc.
5. Clean all spills.
6. When chemicals are spilled on skin, wash for at least 15 minutes with running water.
7. Always have an emergency eye wash nearby.
8. Dispose used chemicals properly.
Subscribe to:
Posts (Atom)