Introduction to Chromatic Chemistry
Chromatic Chemistry is known as the science of _________
Color
Charged molecules are called _________
Ions
What does ROY G BIV stand for?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Name the charge of a proton, neutron, and electron.
Proton (Positive), Neutron (Neutral), Electron (Negative)
Which liquid was used to extract the pigment from the flowers?
Alcohol
In chromatic chemistry, these special molecules interact with light to create color.
Pigments
These charged particles can be added or taken away to create positive or negative molecules
Electrons (Negatively Charged)
Define "intensity."
How strong something is.
What is the ground state?
The lowest amount of energy an atom or molecule has
Name the two natural pH indicators used to test the pH of different substances.
Turmeric, Red Cabbage
What is a chromophore?
The specific part of a molecule that absorbs light and gives the molecule its color.
What is 7 considered on the pH scale?
Neutral
What is a spectrophotometer?
A spectrophotometer is a scientific instrument used to measure the intensity of light at different wavelengths.
What is luminescence?
Luminescence is when light is produced from an object or substance without the use of heat.
What degree angle was the CD slit in the simple spectrophotometer?
45 degrees
Define "wavelength."
The length of one complete cycle of a wave; the distance between two points on waves that are right next to each other.
What makes a substance basic? What makes a substance acidic?
Acidic substances releases H+ molecules when dissolved in water (1-6 on pH scale). Basic substances releases OH- molecules when dissolved in water (8-14 on pH scale).
Name one way a spectrophotometer is used.
Acceptable Answers: Identify Substances, Measure Amounts, Study Colors in Materials, Help in Science and Medicine
The color of luminescent light is determined by the amount of _________ that the electron releases!
Energy
What color did the red cabbage turn in acidic solutions? What color did the red cabbage turn in basic solutions?
In acidic solutions, the red cabbage turns red. In basic solutions, the red cabbage turns blue.
What are rod and cone cells?
Rod and cone cells help us see color. Cone cells help us see in the light; there are red, blue, and green cone cells. Rods help us see black and white in the dark.
What are pH indicators?
Special substances that changes color when mixed with something acidic or basic.
Name the steps to how a spectrophotometer works.
Step 1: Light is shined into a sample using a lamp.
Step 2: Some light is absorbed by the sample. Other parts of the light pass through.
Step 3: The spectrophotometer measures the light that passes through and comes out of the sample.
Step 4: The spectrophotometer shows the resulting measurement as a graph or as numbers.
Describe the steps to how luminescence produces light.
Step 1: Electrons absorb energy
Step 2: The electrons jump up to a higher energy level (excited state)
Step 3: The electrons come back down to their ground state
Step 4: Light comes out!
Why was the glow-in-the-dark slime exposed to light before it could glow?
The glow-in-the-dark slime needed light exposure so it could absorb light energy and then slowly release it as visible light.