Bases turn red litmus paper blue.
Blue ph scale litmus paper.
Acids turn blue litmus paper red.
Sodium hydroxide is a base.
The main use of litmus is to test whether a solution is acidic or basic blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions with the color change occurring over the ph range 4 5 8 3 at 25 c 77 f.
To test the ph of a substance dip a strip of litmus paper into the solution or use a dropper or pipette to drip a small amount of solution onto the litmus paper.
It turns red litmus.
Distilled water has a ph of 7 so it is neutral.
The table shows.
The blue paper changes to red indicating acidity somewhere between the ph range of 4 5 to 8 3.
If it comes in contact with an acidic or neutral substance it will remain red.
Litmus indicator solution turns red in acidic solutions blue in alkaline solutions and purple in neutral solutions.
Common acids include include tartar sauce corn bacon and beer.
Neutral litmus paper is purple.
When red litmus paper is placed into a basic substance it will turn blue.
Note that 8 3 is alkaline red litmus paper can indicate alkalinity with a change to blue.
This is a pass or fail type of test that only works with acidic or basic liquids.
It turns blue litmus paper red.
Litmus can also be prepared as an aqueous solution that functions similarly.
In relation to testing acids i recommend that you use blue litmus paper and if the substance you are testing is an acid the blue will change to red.
Red litmus paper turns blue if it comes in contact with a base alternatively blue litmus paper turns red with acids.
Sulfuric acid is obviously acidic in nature.
In general litmus paper is red below a ph of 4 5 and blue above a ph of 8 3.
A ph scale reading of 6 indicates a weak acid.
Litmus paper comes as red litmus paper and blue litmus paper.
Colorful vector illustration in flat style isolated on white background.
Blue litmus paper can indicate an acid with a ph between 4 and 5 or lower.
Red litmus paper is meant to test only for an alkaline ph level.
Litmus paper color chart.
A ph scale reading of 8 indicates a weak base.
Neutral solutions do not cause a change of color although there are some brands of blue litmus paper that will turn purple if the substance is neutral.
Ph scale diagram with corresponding acidic or alcaline values for common substances food household chemicals.
Knowing whether a substance is acidic or basic is only the first step.
