Caloric Content of Food and Ionic Reactions

Topics: Solubility, Sodium hydroxide, Sodium chloride Pages: 4 (388 words) Published: March 20, 2014
Caloric Content of Food
Introduction:
I will test different foods to figure out how much energy they contain. Materials and Methods:
I filled a beaker half full and put the food I was testing under it and lit it up; after recording the water temperature. Then I recorded the mass of the ashes and I recorded the temperature one last time. I repeated the process for the other test foods as well.

Results:
See table below

Discussion:
This lab helped me learn how to measure the amount of energy contained within each food item.

Questions:
A. Peanut
B. Considerably well
C. Single replacement reaction
D. Carbon dioxide and water
E. Into the air
F. 1. 1400 calories
2. 10.69kJ/gm
3. 158kcal for one serving of fritos

Table:
Item Description
Marshmallow (g)
Peanut (g)
Potato Chip (g)
Mass food
23.6
1
27.2
Mass of burnt food
.6
.5
1.5
Mass of water
50 ml
50ml
50ml
Initial temp
22
23
22
Final temp
28
40
35
Change in temp
6
17
13
Caloric content (Cal/g)
1.2
2.8
2.4

Ionic Reactions
Introduction:
I will learn about ionic reactions and how to balance equations.

Materials and Methods:
I mixed various precipitates to see if the solubility rules apply or if there were exceptions.

Results:
See table below

Discussion:
I formed an idea of different ionic reactions and how they can differ.

Questions:
B. Yes
C. Carbonates, Phosphates, sulfides, oxides or hydroxides form precipitates. Alkali metal hydroxides are the exceptions. D. Most salts.
E. Group one and two cations
F. A1. Cobalt nitrate with Sodium phosphate.
CO(NO3)2+6 H2O+Na3PO4+12 H2O Na3+PO2Co(NO3)2+18 H2OD5. Ba(N03)2 - NaHC03 A7. Cobalt nitrate with sodium hydroxide Co(N03)2 - 6 H20 – NaOH B6. Copper nitrate with sodium carbonate Cu(N03)2 - 3 H20 - Na2C03 C1. Iron nitrate with sodium phosphate Fe(N03)3 - 9 H20 - Na3P04 - 12 H20 C2. Iron nitrate with sodium iodide Fe(N03)3 - 9 H20 – Nal C6. Iron nitrate with sodium carbonate...
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