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6.3 Acid-Base Solutions Phet Simulation
By Jill Mayorga
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Last updated almost 4 years ago
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PS1-5: Acids and Bases
Go to the
phet simulation
and click on introduction
.
Click on Water and Molecules, Drag the pH meter into the solution to get the pH reading
Notice the chemical reaction for water. The product
H
3
O
+
.
is the same as an
H
+
ion
.
This means a compound with H in front.
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Click on
strong base.
What do you notice about the solution?
Question 6
6.
Click on
weak base.
Compare this to
strong base
. What's similar and what is different?
Question 7
7.
Question 8
8.
Why do you think strong acids and bases have a 1 sided arrow and weak acids and bases have a double sided arrow?
Strong acid:
Weak acid:
Question 9
9.
Click on
graph.
Play around with the simulation by clicking on strong and weak acids and bases.
What patterns do you notice in the concentrations (amount) of reactant compounds and product ions that form in the solutions.
The magnifying glass shows the products that form when water breaks down into
2 ions
H
3
O
+
(acid)
and
OH
-
(base)
.
Which is true about the solution that forms when water breaks down into it's 2 ions.
H
3
O
+
=
OH
-
OH
-
>
H
3
O
+
H
3
O
+
>
OH
-
Based on your response to question 1, why do you think the pH of this solution is 7 (neutral)?
The number of
H
3
O
+
is greater than
OH
-
making the solution neutral
The number of
H
3
O
+
is the same as
OH
-
making the solution neutral
The number of
H
3
O
+
is less than
OH
-
making the solution neutral
Click on
strong acid
. What do you notice happens to the solution? Click all that apply
The original
H
+
A
-
compound in the reactants has completely broken apart into
H
3
O
+
and
A
-
ions.
Part of the
H
+
A
-
compound in the reactants breaks down into
H
3
O
+
and
A
-
ions, and part of the original
H
+
A
-
compound remains in solution.
The solution is considered a strong acid because it has a low pH value close to 1.
The solution is considered a weak acid because it has a pH value closer to 7 than 1.
Click on
weak acid
. What do you notice happens to the solution? Click all that apply
The original
H
+
A
-
compound in the reactants has completely broken apart into
H
3
O
+
and
A
-
ions.
Part of the
H
+
A
-
compound in the reactants breaks down into
H
3
O
+
and
A
-
ions, and part of the original
H
+
A
-
compound remains in solution.
The solution is considered a strong acid because it has a low pH value close to 1.
The solution is considered a weak acid because it has a pH value closer to 7 than 1.
What do you think the double sided arrow in a chemical reaction means?
The reactants form only into the products
The products form only into the reactants
Once the reactants form into the products some of the products react and form back into the reactants