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Indicators indicating what?

What are some indicators:

 

There was four different indicators used in this lab; Litmus, Phenophalene, Bromothymol Blue and Universal indicator. Each one indicated something different.

 

What does each indicator indicate:

 

Litmus paper: There are two different types of litmus paper; blue and red. Litmus paper are little pieces of paper that are either blue or red. Each type indicated something different.

 

When Blue litmus paper turns Red an acid is present.

When Red litmus paper turns Blue a base is present.

 

A fun way to remember this is to think of this:

 

When Blue litmus turns red an acid is present. Red is an *aggressive* colour and acids are *aggressive*.

 

When Red litmus paper turns Blue a base is present. Blue is a *pleasant* colour and bases are *pleasant*.

 

Phenophalene(PHTH): Test to see if a baseic substance is present. It does this by turning fuscia when added to a chemical, phenophalene is originally a clear liquid.

 

When PHTH is added to a liquid and turns it fuscia a basic substance is present.

 

Bromethymol Blue (BTB): Test to see if a substance is an acid.

 

When BTB is added to a liquid and turns Yellow a acid is present.

 

Universal: Indicates different pH levels of substances.

 

*You have to know the pH scale to understand the universal  indicators.

Chem

Litmus

Phenophalene

Bromothymol Blue

Universal

Sodium chloride (aq)

 NaCl

 

Nothing

 

Nothing

 

Turquoise

 

Brown

 

Hydrochloric acid (aq)

 HCl

 

Blue --> Red

 

Nothing

 

Yellow

 

Red

Sodium hydroxide (aq)

 NaOH

 

Red --> Blue

 

Hot pink

 

Blue

 

Green

Potassium hydroxide (aq)  KOH

 

Red --> Blue

 

Hot pink

 

Blue

 

Dark purple

Sulfuric acid

(aq)

H2SO4

 

Blue --> Red

 

Nothing

 

Brown

 

Fuchsia

Nitric acid

(aq)

HNO3

 

Blue --> Red

 

Nothing

 

Yellow-orange

 

Scarlet

Ethanol

(l)

CH3CH2OH

 

Nothing

 

Nothing

 

Blue/yellow/green

 

Orange

Methanol

(l)

CH3OH

 

Nothing

 

Nothing

 

Blue

 

Green

Acetic acid

(aq)

CH3COOH

 

Blue --> Red

 

Nothing

 

Yellow

 

 

Red-Orange

Sugar

(aq)

C12H22O11

 

Blue --> Red

 

Nothing

 

Blue

 

Orange-Red

Tap water

(l)

H2O

 

Nothing

 

Nothing

 

Blue

 

Green

Distilled water

(l)

H2O

 

Blue --> Red

 

Nothing

 

Yellow

 

Orange-Red

Copper sulfate

(aq)

CuSO4

 

Blue --> Red

 

Nothing

 

Yellow

 

Brown

 

Ammonium hydroxide (aq) NH4OH

 

Red --> Blue

 

Pink

 

Blue

 

Hunter green

Calcium hydroxide (aq) 

Ca(OH)2

 

Nothing

 

 

Nothing

 

Blue

 

Green

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