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Physical Science Notes 416-436
Titration Lab 1 and 2
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Acid + Base = Salt + Water

Titration Lab 1

 

Problem:

            A student has a waste beaker of a basic solution. She needs to dispose of it safely.

 

What to know:

Acid + Base = to destroy the properties. When you properly mix an acid and a base you can neutralize the solution making it safe for disposal.

 

Acid + Base = Salt + Water. You will create a salt and water when you mix an acid and a base.

 

What you will be doing:

Sometimes its easier to know what your doing in advance. The picture bellow depicts roughly what will happen. Its up to you to figure out how to do it.

 

What happened:

            The following pictures show you the set up for the titration lab.

fig11.jpg
This picture depicts what is mixing together

fig12.jpg
This picture shows the miniscus going down 7 milliliters

Titration Lab 2

 

25.5 started

31.5 stopped

 

A + B ---> S + W

HCl + NaOH ---> Na+Cl- + HOH

 

Add 3 drops of BTB = blue in bases yellow in acids

                                    Turning point of pH 6- 7.6

                                    Roughly neutral green

 

Base to neutralize => add Acid

Make sure you use an indicator that has a turning point in the neutral range.

    Volume A      Volume B

CAVA = CBVB

Concentration Concentration B

 

10ml of NaOH = VB

0.1  mol/L of HCl = CA

~7.00 ml of HCl = VA

 

CB = CAV

              _________

                  VB

 

(.1mol/L) (7mol)

____________

         10ml

 

CB = .07mol/L

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