The most elementary one is Litmus Paper. It measures red for acid and blue for alkali.
Then there is UNIVERSAL INDICATOR, a liquid, This will slowly change colour from red(very acidic (pH 1)) to green(neutrality) (pH 7) to indigo (Alkaline )PH14))
Theren there is a pH meter , which is an electronic probe put into the solution to read off the pH .
A pH meter is an electronic device used for measuring the pH (acidity or alkalinity). In an emergency, acidified tap water can be used, but distilled or deionised.
Litmus paper, or other pH papers can measure pH. Many pH test papers can measure specific pH values. There are also instruments called pH meters that can measure pH.
A pH meter
pH paperselectronic pH meter
nothing
It is a simple and not expensive tool to measure pH.
A pH meter is an electronic device used for measuring the pH (acidity or alkalinity). In an emergency, acidified tap water can be used, but distilled or deionised.
A pH meter
A pH meter
Litmus paper, or other pH papers can measure pH. Many pH test papers can measure specific pH values. There are also instruments called pH meters that can measure pH.
A pH meter
pH paperselectronic pH meter
A pH meter would give the most precise result.
nothing
The pH scale (not hP) is used to measure the acidity/basicity of an aqueous solution. It actually is a measure of the hydronium ion concentration. pH <7 is acidic; pH>7 is basic; pH=7 is neutral.
A pH probe is a device used to measure the acidity of a solution.
This instrument is called pH-meter.