add a base to the solution
Universal indicator doesn't change anything in an acidic or alkali solution. All universal indicator does is show how acidic or alkaline a solution is (red being acidic, green being neutral and blue being alkali)
there is no such indicator.the only way is to add the acidic and basic indicators ,if it does not change the colour of the solution then it is neutral.
The best way to find the strength of an acidic solution is to test it with a pH indicator. This can tell you the pH of the solution, which indicates the relative strength of the acid. Acids have a pH of below 7. The lower the number, the more acidic the solution is.
The pH scale runs from 0 which is extremely acidic, to 14 which is extremely basic. A measurement of 7 indicates a neutral solution.
An Universal Indictator is more helpful because it shows the exact amount of acidity. Other indictators (example the red and blue litmus) just indicates whether or not the solution is acidic. The universal indicator gives you a specific color to which you can match a pH number therefore, telling you how acidic the soultion is.
an universal indicator paper tells you how acid or how alkali it is acid - red alkali - blue neutral - green
look at the pH level. If the pH is from 0 to 7, it is acidic. If it is exactly 7, that means it is water and it is neutral. 7 to 14 is basic.
At the temperature of 298 K, the pH 7.0 indicates neutral solution. Any value below is acidic and any value above is basic.
it depends on what solution
acidic
Sodium nitrate is neutral in water solution..
basic