The universal indicator help us to find the relative acidity/basicty of some che
ID: 699352 • Letter: T
Question
The universal indicator help us to find the relative acidity/basicty of some chemicals. It has the ability to show the colour change according to the ph values of the solution. The follwing table can be used to understand the relative acidity/basicty strength.
pH (1to 2) : Red
pH (3 to 5) : orange
pH (5 to 6) : yellow
pH (7) : green
pH (8 to 9) : blue
pH (10) : navy blue
pH (11 to 12) : purple
pH (13 to 14) : violet
Now according to the table 0.001 M lactic acid having light red colour will be the most acidic, next will be 0.01 M nitrous acid (light orange) and then 0.01 M phenol (light yellow) and least acidic 0.001 M hydrogen peroxide (light green).
Hence the answer is according to the increasing acid strength:
0.001 M hydrogen peroxide < 0.01 M phenol < 0.01 M nitrous acid < 0.001 M lactic acid
Explanation / Answer
The table shows respective color change when a universal Indicator is added to the clear solutions. Rank the samples based on increasing order of acid strongth Solutions 0.001 M lactic acid 0.01 M phenol 0.01 M nitrous acid 0.001 M hydrogen peroxide Color change Light red Light yellow Light orange Light green Rank the solutions by increasing order of their acid strength. To rank items as equivalent, overlap them Hints Reset Help Least acidic Most acidic 0.001 M hydrogen peroxide 0.001 Mlactic acid 0.01 Mphenol 0.01 Mnitrous acid Submit My Answers Give Up
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