How do you find the pH of a solution using a universal indicator?

Answer 1

pH indicators are usually weak acids or weak bases that change their color depending on their dissociation (protonation) state. Sometimes both forms are colored, sometimes only one. In most cases you may assume that to completely change color of bicolored indicator pH must change by 2 units. However, human eye is more sensitive to some colors than to others, thus some color changes can be perceived over wider pH range.

pH indicators can be used to check pH of the solution, although they are rarely added directly. Only in acid-base titrations indicator should be added to the solution. To check pH it is much more convenient to use pH strips. It is worth of noting here that pH strips are nothing else but pieces of paper impregnated with indicator or a mixture of indicators.

Answer 2

Well if you don't want to use pH meter, the only other way to find out is using the pH paper which turns into different colours respectively to the pH of the solution, that is not too accurate, though. ;)

Answer 3

IT'S SO SIMPLE!You would use pH paper to find out if it was acid,alkali or neutral by diping it into the liquid!

Answer 4

you drip a bit of the indicator into the solution and then depending on what kind of indicator you use it will change colour.

Answer 5

Put a small amount of lemonade in a measuring tile, then add two drops of universal indicator. Instantly you should notice that it turns a soft pinkish/red colour and has a pH level of 4.

Answer 6

Comparing the colors an estimation of the pH is possible.

Answer 7

i dont understand because i am russian...