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23 Cards in this Set
- Front
- Back
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What does the law of diffusion state? |
Particles move from area of high concentration to low concentration |
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What happens if you drop a droplet of ink in a hot cup of water vs a cold cup of water |
The ink in hot water will diffuse at a faster rate |
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Why would something diffuse faster in hot water |
Molecules in hot water are moving faster and enable substances to diffuse quicker |
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This is the diffusion of water through a membrane from low concentration to high concentration |
Osmosis |
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This solution has a concentration of dissolved solutes that is equal to the concentration of dissolved solutes in the cell |
Isotonic |
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This solution has concentration of dissolved solutes that is greater to the dissolved solutes inside the cell. |
Hypertonic |
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What happens to a cell in a hypertonic solution? |
Water diffuses out of the cell by osmosis |
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A solution that has a concentration of dissolved solutes that is less to the concentration of dissolved solutes inside the cell |
Hypotonic |
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What happens to cells in a hypotonic solution? |
Water diffuses into the cell by osmosis |
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What happens when a slice of potato is placed in salt water? |
The salt water is a hypertonic solution . The water inside the potato will diffuse out and the potato slice will be lighter, limp, and will have discoloration |
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What will happen when a slice of potato is placed in pure water? |
The pure water is a hypotonic solution and water will infuse into the potato making it havier, firm, and no discoloration |
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What is phenolphtalein? |
A pH indicator that turns pink in the presence of a base. |
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What happens when you place a bag of phenolphthalein in a beaker of sodium hydroxide (NaOH) |
Contents in the dialysis bag turned dark pink because the bag is selectively permeable and let the NaOH molecules through which are small molecules but not the phenolphtalein out because they are bigger molecules. The beaker turned a light pink |
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What is lugol's reagent? |
An indicator that turns black in the presence of starch |
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What happens when you place a dialysis bag full of starch into a beaker of lugol's reagent? |
The bag turned black because the lugol's diffused into it because it's molecules are small enough to go through the dialysis bag. The beaker only got a little dark because the starch's molecules are not big enough to get through |
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What is an enzyme? |
A protein that speeds up reactions but does not get consumed |
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What is a substrate |
A substance that is acted on by the enzyme |
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Where does a substrate bind to an enzyme at? |
The active site |
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What is the enzyme found in potatoes called? |
Catalase |
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What does catalase do? |
Converts peroxide (H202) into water and oxygen |
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What does vinegar do to catalase? |
It is very acidic so it denatures the enzyme |
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Why was detergent added to test tubes containing 3% hydrogen peroxide and potatoes? |
To measure the amount of oxygen produced by the amount of bubbles produced |
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What happens when you place a potato soaked in vinegar in a beaker of hydrogen peroxide vs a piece that was placed ih the same beaker but not soaked in vinegar |
The potato not soaked produces more oxygen (bubbles) than the one soaked in vinegar which produced no oxygen (no bubbles) |
