Name: _________________________________ Period: ________
Identifying Chemical Compounds
A. Study the rules below to complete this worksheet. Then, on the first line under each
formula, tell whether the substance is organic or inorganic. On the second line, indicate
whether the substance is a carbohydrate, lipid, protein/ amino acid, alkane, or none of
these.
B. Rules:
1. All organic compounds contain carbon. Most inorganic compounds do not contain
carbon. Carbon dioxide is an exception; it is inorganic.
2. In carbohydrate molecules, the ratio of carbon to hydrogen to oxygen is 1:2:1.
3. In lipid molecules, the ratio of carbon to hydrogen to oxygen is much greater than
1:2:1.
H
4. Amino acids contain an amino group (NH2, or N – H -); and a carboxyl group
( - COOH).
5. Alkanes (fuels) contain only carbon and hydrogen.
Formula problems:
1.
H
H
H
H
OH
H
H
C
C
C
C
C
C=O
OH OH OH
2.
CO2
H OH
_____________________________
____________________________
_____________________________
___________________________
H
3.
C12H22O11
4.
H
H O
║
N C C OH
H
5.
C
H
______________________________
H
___________________________
______________________________
___________________________
Mg(OH)2
6.
CH4
____________________________________________
___________________________________________
____________________________________________
___________________________________________
7.
C18H34O3
8.
CH3COOH
______________________________
___________________________
______________________________
___________________________
9.
10.
______________________________
___________________________
______________________________
___________________________
11.
12.
NaCl
______________________________
______________________________
___________________________
___________________________
13.
C3 H5(C17H35O2)3
______________________________
______________________________
On the line provided, identify the common name for these compounds.
14. Sodium hydrogen carbonate _______________
15. Methane ______________________
16. Solid carbon dioxide _____________________
17. Ascorbic acid __________________
18. Sucrose _______________________________
19. Acetic acid ___________________
20. Calcium carbonate ______________________
21. Maltose ______________________
22. Magnesium hydroxide ___________________
23. Sodium chloride _______________