Q:

Why does litmus paper change colors?

A:

Quick Answer

Litmus paper changes colors in response to an acidic or base solution. Acidic solutions result in a color change that is red. Neutral solutions yield a purple color.

  Know More

Full Answer

Solutions with pH levels below seven are considered acidic. Those with pH levels at seven are considered neutral. Litmus paper is paper that has been treated with a mixture of natural dyes known as lichens, or Roccella tinctoria.

Litmus paper is not the only method of using color change to detect pH level. One natural way to do so is to use red cabbage juice. It appears red in acidic solutions, blue in neutral ones and greenish-yellow is base solution with pH levels at 12.

Learn more about Chem Lab

Try a quiz

Q:
How many colors are in a rainbow?

Related Questions

  • Q:

    What is a physical change?

    A:

    In chemistry, a physical change occurs when matter is altered without modifying its basic molecular composition. Some examples of physical changes include boiling or freezing of water, chopping up wood, melting of gold or dissolving salt in water.

    Full Answer >
    Filed Under:
  • Q:

    What is pH paper used for?

    A:

    A piece of pH indicator paper is used to gauge the acidity or alkalinity of a solution. Different types of pH indicator paper are used depending on the type of test and level of accuracy required, such as red or blue litmus paper.

    Full Answer >
    Filed Under:
  • Q:

    What is fluted filter paper?

    A:

    Fluted filter paper is a circular piece of filter paper folded in an accordion style and used to filter solid impurities from a liquid during gravity filtration. The fluting of the paper increases the surface area of the filter.

    Full Answer >
    Filed Under:
  • Q:

    What are the colors on a universal indicator?

    A:

    Colors on a universal indicator pH chart include: red, orange and yellow for acids, light green for neutral, and green, blue and violet for bases. The universal indicator chart assigns a color to each pH level on a scale of four to 10 pH.

    Full Answer >
    Filed Under:

Explore