pH Lab Demo

Presentation

•

Chemistry

•

10th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-2

Standards-aligned

Lauren Rush

Used 17+ times

FREE Resource

4 Slides • 7 Questions

pH Lab Demo

pH: a measure of the concentration of H₃O⁺ ions in a solution

acidic pH < 7

basic pH > 7

neutral pH = 7

pH Indicators

Changes colors based on the pH of a solution
In this demo we will be using the Litmus paper as an indicator
For Litmus Paper: acids turn blue paper red; bases turn red paper blue

Multiple Choice

What will happen when we dip lemon juice (an acid) in the RED litmus paper?

It will turn blue

It will stay red

Multiple Choice

What will happen when we dip the BLUE paper in the lemon juice?

It will stay blue

It will turn red

Multiple Choice

What will happen when we dip the RED paper into the baking soda (a base)?

It will stay red

It will turn blue

Multiple Choice

What will happen when we dip the baking soda into the BLUE paper?

It will stay blue

It will turn red

Now we are going to try an identify mystery solutions as an acid or base, using the litmus paper.

Watch the demostrations with Solution A, B and C, then try to classify each as an acid, base or neutral solution.

Open Ended

Based on the two Litmus Paper Tests, do you think Solution A is an acid or a base?

Type response here

Open Ended

Based on the two Litmus paper tests, what do you think Solution B is?

Type response here

Open Ended

Based on the two Litmus paper tests, what do you think Solution C is?

Type response here

pH Lab Demo

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