States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
What is the objective of this experiment in a few sentences?
PART C & D (couldn't post picture)
c. Acid Hydrolysis
In a small erlenmeyer flask place 25 mL of the stock starch solution and 5 mL of 10%
HCI and mix. Place in boiling water bath. After 30 minutes of heating, use a plastic
pipette to withdraw a few drops (aliquot) and place them on a spot plate. Allow to cool
for a few seconds and add 2 drops of iodine solution. Observe color and interpret the
results.
Withdraw and test an aliquot every 5 minutes until the test with iodine does not produce a
blue color. Keep track of the total elapsed time. Interpret the results. Do not discard
sample and proceed to part d.
d. Fehlings Test on hydrolyzed sample
Upon completing part c. above and the test no longer gives a blue color, withdraw a 5 mL
sample and neutralize with 10% NaOH until no longer acidic to litmus. Add 1 mL of
Fehlings solution (A+B), place in boiling water bath, and time any color change as
before. Compare this result with your result from part b. above. Interpret your results.
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