Question

in the margin indicate full marks.
उपांत के अंक पूर्णांक निर्दिष्ट करते हैं।
All questions are compulsory.
सभी प्रश्न अनिवार्य हैं।
1. a) Prepare 250 ml of M
M
solution of oxalic acid.
20
4
ऑक्जैलिक अम्ल का 250 ml
M
b)
विलयन तैयार करें।
20
With the help of this solution determine the molarity of given KMnO4
solution. .
6
इस विलयन की सहायता से दिए गए KMnO, विलयन की मोलरता ज्ञात करें।
1 of​

Answer 1

Answer:

Weigh 3.150 g oxalic acid on the watch glass accurately and record this weight in the note-book.

Transfer gently and carefully the oxalic acid from the watch glass into a clean 250 ml beaker. Wash the watch glass with distilled water with the help of a wash bottle to transfer the particles sticking to it into the beaker [Fig].

The volume of distilled water for this purpose should not be more than 50 ml.

Dissolve oxalic acid crystals in the beaker by gentle stirring with a clean glass rod.

When the oxalic acid in the beaker is completely dissolved, transfer carefully the entire solution from the beaker into a 250 ml measuring flask (volumetric flask) with the help of a funnel [Fig].

Explanation: