This indicates a pH value of 7 and tells us that water is neither alkaline or acid, but neutral ... the colour of the indicator to the colour chart below. An indicator is a substance which ...

In making a pH determination on soil, the sample is saturated with the dye for a few minutes and the color observed. This method is accurate enough for most purposes. Kits (pH) containing the ...

Did you know that consuming too many acidic foods and liquids can lead to health problems? But how do you know if what you’re ...

Use a measuring cylinder to add dilute hydrochloric acid to a beaker ... then match the colour to a pH colour chart. Record the estimated pH. Add a level spatula of calcium hydroxide powder ...