Blue Ph Scale Litmus Paper

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.

Blue ph scale litmus paper.

Sodium hydroxide is a base. If it comes in contact with an acidic or neutral substance it will remain red. 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. Litmus can also be prepared as an aqueous solution that functions similarly.

Examples of litmus paper color changes. 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. Common acids include include tartar sauce corn bacon and beer. In general litmus paper is red below a ph of 4 5 and blue above a ph of 8 3.

Ph scale diagram with corresponding acidic or alcaline values for common substances food household chemicals. Litmus indicator solution turns red in acidic solutions blue in alkaline solutions and purple in neutral solutions. Acids turn blue litmus paper red. Colorful vector illustration in flat style isolated on white background.

A ph scale reading of 6 indicates a weak acid. The table shows. This is a pass or fail type of test that only works with acidic or basic liquids. Distilled water has a ph of 7 so it is neutral.

Litmus paper comes as red litmus paper and blue litmus paper. When red litmus paper is placed into a basic substance it will turn blue. Red litmus paper can show a base with a ph greater than 8. Bases turn red litmus paper blue.

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. Initially litmus paper is either red or blue. Litmus paper color chart. A ph scale reading of 8 indicates a weak base.

Red litmus paper is meant to test only for an alkaline ph level. Red litmus paper turns blue if it comes in contact with a base alternatively blue litmus paper turns red with acids. Note that 8 3 is alkaline red litmus paper can indicate alkalinity with a change to blue. The blue paper changes to red indicating acidity somewhere between the ph range of 4 5 to 8 3.

It turns red litmus. Blue litmus paper can indicate an acid with a ph between 4 and 5 or lower. Neutral litmus paper is purple.