Why don't we use indicators in redox-titration?
Because the end point can easily be observed.
Example: consider the titration between potassium manganate (IV) which is purple and ammonium iron (II) sulfate - colourless.
At the end point the colourless standard solution will turn pale pink when the correct volume of deep purple titre is added. No indicator is required. Also this is not necessarily an acid base rxn
What are key economic variables that economists use to predict a new phase of a business cycle referred to as?
Development depends on both social and economic factors.Accordingly development indicators are distinguished into social indicators and economic indicators.In recent times increasing importance are given to the social indicators of development.So discussion on social indicators of development are of recent origin. Now there is a universally accepted meaning of social indicators of development is accepted and that is clearly different from the economic indicators. everything that does not fall into the category of economy is taken…
They help people determine how wealthy a country's economy is. Economy indicators are useful because they make it easier to monitor money, improvement, and change. This is important when the economy isn't doing so well. Economic indicator best describes economic activities. These can be one of three indicators namely leading indicators, lagging indicators, and coincident indicators.
You identify acids and alkalis using indicators. Indicators are substances which turns a particular colour for acids and another for bases. E.g. litmus, (acid-red, alkali-green) and phenolphthalein. Indicators have a certain pH value. You can only use a particular indicator of a suitable pH value for a particular acid-base reaction
Indicators change the colours when the PH of the sample changes. So during titration when the reaction is complete a new product will form which is resulting in sudden change of PH. This can be detected by the change in the colour of the sample. The reaction may be neutralization reaction or Redox reaction. So to know the exact stoichiometric quantity of reagents to complete a reaction we must use Indicators. different indicators give different…