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To Observe Acid- Base Properties of Four Solutions Using Indicators, in Order to Classify the Solution as Acids or Bases

Essay by   •  December 18, 2018  •  Lab Report  •  454 Words (2 Pages)  •  120 Views

Essay Preview: To Observe Acid- Base Properties of Four Solutions Using Indicators, in Order to Classify the Solution as Acids or Bases

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 5.1 B: Properties of Acids and Bases                                      

Purpose: To observe acid- base properties of four solutions using indicators, in order to classify the solution as acids or bases

Materials: Refer to page 230 in text

Procedure: Refer to page 230 in text

Observations: Data chart

Data table

Original colour

Mg ribbon

Red litmus

Blue litmus

Bromothymol

blue

Phenolthalein

Methyl

Orange

Acid or base

Solution

A

Light

yellow

Turned

white

Stays light red

Turns light red

Turns light yellow

Stays light yellow

Turns dark red

Acid

Solution

B

Clear/

Colourless

Turned

Dark black

Turns dark blue

Turns dark blue

Turned dark blue

Turns pink/red

Turns dark yellow

Base

Solution

C

Clear/ colourless

Turned

Dark black

Turns dark blue

Turns dark blue

Turned dark blue

Turns pink/red

Turns light yellow

Base

Solution

D

Clear/ colourless

Turned dark black

Turns dark blue

Turns dark blue

Turned dark blue

Turns pink/red

Turns dark yellow

Base

Discussion

Pg 231 1-4

List the solutions in order from most acidic to least acidic. Solution A, Solution C, Solution B, Solution D

Which solution do you think was neutral? I think that if there was a solution that is neutral it would have to be solution D because one of the litmus red indicators for that solution still had a small amount of red at the tip

I believe solution c is more basic. It is more basic because in the solution methyl orange turned bright yellow, if u look at the acid base indicator chart the yellow colour the brighter the yellow the more basic it is and the darker it is the more acidic it is. Also, when bromothymol blue was added to solution c it stayed blue which means it’s a base.

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