Indicators:
Inidcators differenciate an acid from a base and the strength of that acid or base.
Below is a chart of inidcators and how they are effected when mixed with an acid, base or a neutral solution.
Below is a chart of inidcators and how they are effected when mixed with an acid, base or a neutral solution.
Acid Base Neutral |
Red Litmus Paper
Red Blue Red |
Blue Litmus Paper
Red Blue Blue |
pH Strip
0-6 8-14 7 |
Universal Indicator
ROY BIV G |
Red Litmus Paper: When placed into an acidic solution the paper would stay red, where as when placed into a basic solution the paper would turn blue. When placed into a neutral solution (a liquid that is niether an acid or a base, with a pH of 7), the paper would stay red.
Blue Litmus Paper: Blue litmus paper is the exact opposite of red litmus paper, when placed into an acidic solution the paper would turn red, where as when placed into a basic solution the paper would stay blue. When placed into a neutral solution (a liquid that is niether an acid or a base, with a pH of 7), the paper would stay blue.
pH Strip: A pH strip is a strip of paper with four boxes covering half of a side. When a pH strip is placed into a solution, the four colors would change. On the box, containing all the pH strips, there is a guide for you to compare the changed colors, to the colors on the box. Each color strip on the box corrispods with a number, that is the pH level. The pH level indicates how acid or basic (or neutral) the substance you tested is. The pH scale ranged from 1-14, 1-6 being acidic, 7 being neutral and 8-14 being basic. To learn more about pH click here.
Universal Inidactor: Universal inidcator is a liquid that when mixed into a solution, depending if it is acid or basic, will change color. If the inidcator is mixed with an acid solution, the liquid would turn either red, orange or yellow (red being a strong acid and yellow being a weak acid). If the inidcator is mixed with a basic solution, the liquid would turn blue, indigo or violet (blue being a strong base and violet being a strong base). When the indicator is mixed into a solution and turns green, the liquid is neutral (lniether an acid or a base, with a pH of 7)
Blue Litmus Paper: Blue litmus paper is the exact opposite of red litmus paper, when placed into an acidic solution the paper would turn red, where as when placed into a basic solution the paper would stay blue. When placed into a neutral solution (a liquid that is niether an acid or a base, with a pH of 7), the paper would stay blue.
pH Strip: A pH strip is a strip of paper with four boxes covering half of a side. When a pH strip is placed into a solution, the four colors would change. On the box, containing all the pH strips, there is a guide for you to compare the changed colors, to the colors on the box. Each color strip on the box corrispods with a number, that is the pH level. The pH level indicates how acid or basic (or neutral) the substance you tested is. The pH scale ranged from 1-14, 1-6 being acidic, 7 being neutral and 8-14 being basic. To learn more about pH click here.
Universal Inidactor: Universal inidcator is a liquid that when mixed into a solution, depending if it is acid or basic, will change color. If the inidcator is mixed with an acid solution, the liquid would turn either red, orange or yellow (red being a strong acid and yellow being a weak acid). If the inidcator is mixed with a basic solution, the liquid would turn blue, indigo or violet (blue being a strong base and violet being a strong base). When the indicator is mixed into a solution and turns green, the liquid is neutral (lniether an acid or a base, with a pH of 7)