Blue Litmus Paper Ph Scale

In general litmus paper is red below a ph of 4 5 and blue above a ph of 8 3. Examples of litmus paper color changes. Note that 8 3 is alkaline red litmus paper can indicate alkalinity with a change to blue.

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Litmus paper color chart.

Blue litmus paper ph scale.

Litmus indicator solution turns red in acidic solutions blue in alkaline solutions and purple in neutral solutions. Litmus paper comes as red litmus paper and blue litmus paper. It turns red litmus. Initially litmus paper is either red or blue.

Sodium hydroxide is a base. A lower ph means something is more acidic also known as a stronger acid. It turns blue litmus paper red. Sulfuric acid is obviously acidic in nature.

Chemistry classes will often use a litmus test to identify acids from bases. Blue litmus paper can indicate an acid with a ph between 4 and 5 or lower. A blue litmus paper turns red in acids while a red litmus paper turns blue in basic solutions. Acids turn blue litmus paper red.

The table shows. Bases turn red litmus paper blue. A higher ph means it is more alkaline or a stronger base. 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.

A ph scale reading of 8 indicates a weak base. Red litmus paper can show a base with a ph greater than 8. A ph scale reading of 6 indicates a weak acid. The blue paper changes to red indicating acidity somewhere between the ph range of 4 5 to 8 3.

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