Physical And Chemical Change Of Six White Substances
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Jacqueline Sanders Myra Bradwell School
7736 South Burnham
Chicago, IL 60649
(1). To determine whether the reaction between selected white substances and
vinegar, water and iodine are chemical or physical.
(2). Make a hypothesis using observation, touch and smell.
(3). Through chemical analysis the students will be able to determine what
happens to each of the substances - i.e. will they (a) clump or clot;
(b) bubble or fizz; (c) separate; (d) give off a sweet or foul odor;
(e) change colors.
(1). Petri dishes or Egg cart.
(2). Six white substances: powdered sugar, salt, baby powder, cornstarch,
baking soda and plaster.
CAUTIONS TO STUDENTS:
Use of iodine can cause damage to clothing, irritation to skin and breathing
iodine can be hazardous to your health.
Test each substance individually with the following materials: water, vinegar
and iodine. Make a hypothesis using observation, touch and smell.
The substances have been identified as follows: powder sugar, salt, baby powder,
cornstarch, baking soda and plaster.
Physical Change- is one in which the appearance of matter changes but its
properties and makeup remain the same.
Chemical Change- is a change that produces one or more kinds of matter that are
different from those present before the change.
Chemical Property- the ability of substances to undergo or resist chemical
Observation- is an examination of something in nature. Observing is more than
seeing, it requires attention to details. It is a skill that requires patience