Question

OR
A student was provided with a pH chart by the teacher and asked to observe the colour corresponding
to pH 1 and 14 respectively. The correct answer would be:
(a) yellow, green
(b) violet, orange
(c) red, blue
(d) blue, mustard​

Answer 1

Answer:

The right answer will be red and violet or indigo..

because <3 is red and

>11 is violet or indigo

hope it will be help full

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Answer 2

A student was provided with a pH chart by the teacher and asked to observe the colour corresponding  

to pH 1 and 14 respectively. The correct answer would be:(c) red, blue

Explanation:

Every Chemical substance has certain nature :

• Acidic  
• Basic  
• Neutral  

Arhenius Concept:  

• The acids are those that when dissolved in water, give hydrogen ion or we can write hydronium ion (H3O⁺)  
• According to Arhenius bases are those that when dissolved in water gives hydroxide ion (OH⁻)  

Example : calcium hydroxide Ca(OH)₂  

Strength of acid and base-  

Is expressed in terms of pH  

pH

It is the Logarithm of Reciprocal of Hydrogen ion Concentration.  

i.e.: pH =-Log(H⁺)  

THE pH OF ANY SUBSTANCE CAN BE DETECTED BY USING pH PAPER OR pH SCALE .  

• pH scale consists of Scale ranging from 0 to 14 .  
• pH ranging from 0 to 7 are : acids  
• pH ranging from 7 to 14: bases  
• And 7 is : neutral  
• For Measuring, We Have pH Scale Given By:  

Observations Made On The Bases Of pH Values  

pH Range Indicate the strength of acids and bases as given below :  

• 0-2: Strong Acid  
• 2-4: Moderately Acidic  
• More Than 4: Weak Acid  
• At 7: Neutral  
• 7-10: Weak Base  
• 10-12: Moderately Basic  
• More Than 12: Strongly Base  

The pH chart colour from pH 1 to pH 14 ranges from red to blue as in scale we move from acidic to basic character .