0 reads0 ratings0 helpful
What is the approximate mole fraction of acid in a 36.5% by mass hydrochloric acid solution?36.5% द्रव्यमान वाले हाइड्रोक्लोरिक अम्ल विलयन में अम्ल का मोल अंश लगभग कितना है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 0.221०.२२१
Take 100 g of solution. It contains 36.5 g HCl, equal to 36.5/36.5 = 1 mol, and 63.5 g water, equal to 63.5/18 ≈ 3.528 mol. Total moles are 1 + 3.528 = 4.528 mol. Therefore, the HCl mole fraction is 1/4.528 ≈ 0.221, so B is correct. The value 0.365 is the mass fraction, not the mole fraction, and 0.635 is the water mass fraction.100 g विलयन मानें। इसमें 36.5 g HCl अर्थात 36.5/36.5 = 1 mol HCl और 63.5 g जल अर्थात 63.5/18 ≈ 3.528 mol जल होगा। कुल मोल = 1 + 3.528 = 4.528 mol। इसलिए HCl का मोल अंश = 1/4.528 ≈ 0.221, अतः B सही है। 0.365 द्रव्यमान अंश है, मोल अंश नहीं; 0.635 जल का द्रव्यमान अंश दर्शाता है।
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
