The colour of phenolphthalein in acid is...

The colour of phenolphthalein in acid is-

Red

Yellow

Colourless

Green

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What is the colour of phenolphthalein in NaOH ?

Phenolphthalein is-

Colour of phenolphthalein in acidic medium

The pink colour of phenolphthalein in alkaline medium is due to

0.848 g aqueous solution of a mixture containing Na_(2)CO_(3) NaOH, and an inert matter is titrated with (M)/(2) HCl. The colour of phenolphthalein disappears when 20 " mL of " the acid has been added. Methyl orange is then added and 8.0 mL more of the acid is requried to give a red colour to the solution. The percentage of Na_(2)CO_(3) is

During the neutralisation of an acid by a base, the end point refers to the completion of reaction. The detection of end point in acid-base neutralisation is usually made by an acid-base indicator. An acid-base indicator is itself a weak acid (Phenolphthalein) or a weak base (Methyl orange). At 50% ionisation which depends on the medium. the anion furnished by an indicator (acid) cation furnished colour to solution at end point. For example, phenolphthalein dissociation underset("Colourless")(HIn)toH^(+)+underset("Pink")(In^(-)),K_(HIn)=([H^(+)][In^(-)])/([HIn]) is favoured in presence of alkali and pink colour of phenolphthalein ion is noticed as soon as the medium changes to alkali nature. The end point of acid-base neutralisation not necessarily coincides with eqivalence point but it is closer to equivalence point. Also at equivalence point of acid-base neutralisation, pH is not necessarily equal to 7. Which of the following statements are correct? (P) Phenolphthalein is not a good indicator for weak alkali titrations. (Q) Phenolphthalein does not give pink colour with weak alkalies as NH_(4)OH (R) Phenolphthalein is an basic indicator and imparts colour in basic medium.

MOTION-IONIC EQUILIBRUIM-Exercise -1

Which of the following will produce a buffer sollution when mixed in e...
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The pH of buffer of NH4OH + NH4Cl - type is given by -
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A buffer solution can be prepared by mixing solution of:
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Which one of the following mixture does not act as a buffer solution?
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In the neutralization process of H3PO4 and NaOH, the number of buffers...
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H(2)CO(3)+NaHCO(3) found in blood helps in maintaining pH of the blood...
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pH range of colour change for methyl orange indicator is-
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The colour of phenolphthalein in acid is-
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Methyl orange is an example of :
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Phenolphthalein is-
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According to Modern quinoid theory the indicator used in acid-alkali t...
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Phenolphthalein shows colour change in a definite pH range, which is-
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If s is the molar solubility of Ag2SO4, then
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Which of the following would increase the solubility of Pb(OH)(2)?
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The aqueous solution of which of the following sulphides would contain...
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Which of the following has the maximum solubility in water?
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The necessary condition for saturated solution is –
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At 30^(@) C the solubility of Ag(2)CO(3) (K(SP)=8xx10^(-12)) would be ...
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Which of the following expressions shows the saturated solution of PbS...
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The correct relation between Ksp and solubility for the salt KAI(SO(4)...
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