chemistry: acid - base titration analysis using antacid tablet

8/10/2019 Chemistry: Acid - Base titration analysis using antacid tablet

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EXPERIMEN

ACID-BASE TITRA

ANALYSIS OF ANTACID TA

CAL

D

GUIL


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THEORETICAL BACKGROUND

What is an Antacid?

Antacids

- these are substances that consists of weak bases (hy

carbonate) which is used to treat stomach acidity by neutra

gastric hydrochloric acid or preventing too much secretion o- This can be used to treat heartburn, indigestion and ac

indigestion.

- Antacids are made up of different kind of chemicals. So

common ones include Al(OH)3,Al(OH)3,or both.


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Antacids are medicines that help correct the pH ba

in your stomach. Your stomach has its own natural acid

sometimes these acids become too much for your sto

to handle. This is caused when you dont eat on time

you have an empty stomach. What the antacid doesneutralize this affect. They buffer the stomachsgastric

since they are basic in nature.



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Neutralization

When a strong acid and a strong base solution aneutralization reaction occurs, and the products do

characteristics of either acids or bases. Instead, a neut

water are formed. Look at the reaction below:

HCl(aq)+ NaOH(aq) H2O(l)+ NaCl(aq)

The efficiency of antacid can be determined by finding

of grams of HCl that can be neutralized by 1 gram tablet

the amount of HCl, the more efficient the antacid is. Th

can be used:

NHClX VHCl= NNaOHX VNaOH(dilution)



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MATERIALS & METHODOLOGY

REAGENTS

1. 0.1 M HCl solution

2. 0.1 M NaOH solution

3. Antacid tablets

4. Phenolphthalein indicator

MATERIALS

1. 250 mL Erlenmeyer Flask

2. Base & Acid burette

3. Medicine dropper

4. Mortar & pestle

5. Analytical balance6. 100 mL graduated cylinde


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1. Crush two antacid tablets.2. Get the actual weight of the crushed tablets

and transfer into the flask.3. Add 50.0 mL of 0.1 M HCl to the antacid and

dissolve.4. Add 2(3) drops of phenolphthalein indicator

into the mixture.5. Titrate the antacid mixture with 0.1 M NaOH

until the solution turns to faint pink color.6. Do at least 2 trials.7. Calculate the weight of HCl that reacted with

the antacid.



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RESULTS & DISCUSSIONS

No. of Trials 1 2

Weight of the tablet 0.8203 g 0.825

Final volume of NaOH used 15 mL 15

Initial volume of NaOH 0 mL 0 m

Volume of NaOH used 15 mL 15 m

Molarity of NaOH O.1 M 0.1


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No. of Trials 1 2

Molarity of HCl 0.1 M 0.1

Volume of HCl 50 mL 5 m

Weight of HCL has reactedwith antacid acid 0.12671 g 0.127

Weigh of the HCl gram of

antacid tablet.0.16 0.1


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REFERENCES

http://www.healthline.com/health/antacids

http://humantouchofchemistry.com/how-antacids-work.htm
http://www.healthline.com/health/antacidshttp://www.healthline.com/health/antacidshttp://www.healthline.com/health/antacids

chemistry: acid - base titration analysis using antacid tablet

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