Is sugar acidic or basic?
I assume that you mean table sugar (sucrose).A solution of sucrose in water is just a little bit acidic. However, the acidity is too weak to be of any significance, so sucrose is considered to be neutral.Sucrose has a [math]pK_{a}[/math] of 12.62 at 298 K. (Source: Appendix 2: Dissociation Constants (pKa) of Common Sugars and Alcohols)So the the pH of a 0.1 M (34.2 g/L) solution of sucrose in water would be 6.73.At 0.01 M (3.42 g/L), the pH is 6.95As you can see, the pH in both cases is quite close to 7, i.e. nearly neutral.
What colour will be given by turmeric if we put it in an acid?
Besides litmus, turmeric is also used as a natural indicator. By natural indicator, I mean a dye extracted from some coloring part of a plant, and used to detect the acidic and basic medium and other pH changes.Turmeric gives yellow color in acid medium and brownish red in basic medium.
Does sugar solution turn turmeric red?
Curd, lemon juice, orange juice and vinegar taste sour. These substances taste sour because they contain acids. The chemical nature of such substances is acidic. The word acid comes from the Latin word acere which means sour. The acids in these substances are natural acids.If not, what is its taste? Since, it does not taste sour it means, that it has no acids in it. It is bitter in taste. If you rub its solution between fingers, it feels soapy. Substances like these whichare bitter in taste and feel soapy on touching are known as bases. The nature of such substances is said to be basic.Special type of substances are used to test whether a substance is acidic or basic. These substances are known as indicators. The indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, china rosepetals (Gudhal), etc., are some of the naturally occurring indicators.
What is used to test whether a substance is acidic or basic?
Litmus paper, pH paper, indicators and pH meter can be used to test whether a substance is acidic or basic.Litmus paper is used to determine whether an aqueous solution is acidic (pH<7.0) or basic/alkaline (pH>7.0) in nature.Blue litmus paper turns to red in acidic medium (pH<7.0).Red litmus paper turns to blue in alkaline/basic medium (pH>7.0).No change in color of litmus paper is seen at neutral pH (pH 7.0).2. Various Indicators or dyes such as phenol- phthalein, topfer’s indicator, phenol red, methyl orange, thymol blue, bromophenol blue, etc. are used to find out acidic pH or basic/alkaline pH. The indicators show different colors in acidic and basic media, e.g. methyl orange and topfer’s indicator turn red in acidic medium and phenolphthalein turns pink in alkaline medium.3. pH paper strips are used to determine pH. A drop of solution is kept on the pH paper strip and the color developed on the strip is matched with the provided standard color-pH chart to find out the pH. Although determination of pH by this method is easy and quick, but not accurate. It gives fairly accurate value.Electronic (Digital) pH meter is used for accurate measurement of pH. The basic components of an electronic pH meter are indicator electrode (special glass electrode sensitive to H+), a reference (or calomel) electrode and potentiometer.