Acid and Cm

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  • Topic: Acid, PH, Hydronium
  • Pages : 2 (533 words )
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  • Published : March 14, 2013
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Experiment 1: What Household Substances are Acidic or Basic? Table 1: pH values of common household substances
Substance| pH Guess| pH Paper|
Vinegar|  5| 3|
Sodium bicarbonate solution|  6| 8|
 Lemon juice|  4|  2-3|
Vegetable oil|  8|  4|
 Bottle water|  7|  7|
 Hot sauce|  5|  3|
Questions
1. Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations.
An acid produces hydronium ions by donating a proton H+ to water. Base produces hydroxide ions OH- by accepting a proton from water. Acid and Base are opposites, when acids and a base counter balance which other it is neutral. 2. Name two acids and two bases you often use.

The two acids I often use are Lemons and Hot sauce. The two bases I often use are water and dish soaps

Experiment 2: The Effect of Surface Area and Volume

Table 2: Results from surface area to volume experiment
Cube Dimensions| Surface Area (cm2)| Volume (cm3)| Surface Area : Volume| Time Require for Complete Color Change| Distance of Diffusion| 1 cm x 1 cm x 1 cm| 6cm2| 1cm3| 6cm3| 7mins|  Little coloring left| 1 cm x 2 cm x 2 cm| 12cm2| 4cm3| 3cm3| 12mins| Semi-diffusion| 1 cm x 1 cm x 6 cm| 6cm2| 6cm3| 1cm3| 5mins|  full|

Questions
1. How did the surface area affect the diffusion of the cube? What about the volume? What about the surface area to volume ratio? Which of these had the greatest effect on the diffusion into the cube?

It affects the surface area by moving the diffusion quicker. The volume determines how fast it can diffusion the bigger the slower the diffusion the smaller it is the better and faster the diffusion. The volume has the greatest affect because the size takes up how fast it can diffuse. Cube three took the longest.

2. How does this experiment demonstrate the need for larger cells to divide?
By the different lengths and measurements of space needed. The bigger the space...
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