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20mL of 0.5 M HCl and 35 mL of 0.1 N NaO...

20mL of 0.5 M HCl and 35 mL of 0.1 N NaOH are mixed. The resulting solution will

A

be neutral

B

be basic

C

turn phenolphthalein solution pink

D

turn methyl orange red

Text Solution

Verified by Experts

The correct Answer is:
D
20 ml of 0.5 N HCl contain `20xx0.5` milli eq. = 10 milli eq. of HCl . 15 ml of 0.1 N NaOH contains `35xx0.1` milli eq = 3.5 milli eq of NaOH . Thus, 3.5 milli eq of NaOH will nutralize 3.5 milli eq of HCl. (10-35)= 6.5 milli eq of HCl will be left.
Hence, solution will be acidic and it will turn methyl orange red.
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