Calculate the pH at which an indicator with pKb = 5 changes colour

Calcualte the pH at which an indicator with pK_(b) = 4 changes colour.

Calculate the pH at which an acid indicator with K_(a), = 1.0 xx 10^(-4) changes colour when the indicator concentration is 2.0 xx 10^(-5) M

Calculate the pH at which an acid indicator with K_(a) = 1.0 xx 10^(-5) changes colour when the indicator is 1.00 xx 10^(-3)M .

Calculate pH at which an acid indicator Hin with concentration 0.1M changes its colour ( K_(a) for "Hin" = 1 xx 10^(-5) )

At what pH will a 10 −4 M solution of an indicator with K b ​ =1×10 −11 change colour?

At what pH will a 1.0 xx 10^(-3)M solution of an indicator with K_(b) = 1.0 xx 10^(-10) changes colour?

A certain acid-base indicator is red in acid solution and blue in basic medium. At pH=5 75% of the indictor is present in the solution in its blue form. Calculate the pH at which indicator shows 90% red form ?

The pH indicators are

An acid base indicator has K_(a)=1.0xx10^(-5) the acid form of the indicator is red and the basic form is blue. Calculate the pH change required to change the colour of the indicator from 80% red to 80% blue.

Complete the statements given below using the correct word /s The indicator which does not change colour on passage of hydrogen chloride gas is _________[moist blur litmus/phenolphthalein / methyl orange]