{"id":387101,"date":"2023-01-10T08:52:04","date_gmt":"2023-01-10T03:22:04","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/the-density-of-2-m-aqueous-solution-of-naoh-is-1-28-g-cm3-the-molality-of-the-solution-is-given-that-molecular-mass-of-naoh-40-g-mol-1\/"},"modified":"2023-01-10T08:52:04","modified_gmt":"2023-01-10T03:22:04","slug":"the-density-of-2-m-aqueous-solution-of-naoh-is-1-28-g-cm3-the-molality-of-the-solution-is-given-that-molecular-mass-of-naoh-40-g-mol-1","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/the-density-of-2-m-aqueous-solution-of-naoh-is-128-gcm3-t\/","title":{"rendered":"The density of 2 M aqueous solution of NaOH is 1.28 g\/cm3. The molality of the solution is [Given that molecular mass of NaOH = 40 g\u00a0mol-1]"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"The density of 2 M aqueous solution of NaOH is 1.28 g\/cm3. The molality of the solution is [Given that molecular mass of NaOH = 40 g\u00a0mol-1]","custom_permalink":"question\/chemistry\/the-density-of-2-m-aqueous-solution-of-naoh-is-128-gcm3-t\/"},"categories":[1],"acf":{"question":"<p>The density of 2 M aqueous solution of NaOH is 1.28 g\/<math style=\"font-family:Arial;\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mstyle mathsize=\"12px\"><msup><mi>cm<\/mi><mn>3<\/mn><\/msup><\/mstyle><\/math>. The molality of the solution is [Given that molecular mass of NaOH = 40 g&nbsp;<math style=\"font-family:Arial;\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mstyle mathsize=\"12px\"><msup><mi>mol<\/mi><mrow><mo>-<\/mo><mn>1<\/mn><\/mrow><\/msup><\/mstyle><\/math>]<\/p>","options":[{"option":"<p>1.32 m<\/p>","correct":false},{"option":"<p>1.20 m<\/p>","correct":false},{"option":"<p>1.67 m<\/p>","correct":true},{"option":"<p>1.20 m<\/p>","correct":false}],"solution":"<p>Let, volume of solution = 1 litre<br>Mole of NaOH = 2<br>Mass of NaOH solution = 1000 \u00d7 1.28 = 1280 g<br>Mass of&nbsp;<math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><msub><mi>H<\/mi><mn>2<\/mn><\/msub><\/math>O = (1280 \u2013 2 \u00d7 40) = 1200 g = 1.2 kg<\/p><p><math style=\"font-family:Arial;\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mstyle mathsize=\"16px\"><mtext>&nbsp;Molality&nbsp;<\/mtext><mo>(<\/mo><mi mathvariant=\"normal\">m<\/mi><mo>)<\/mo><mo>=<\/mo><mfrac><mrow><mtext>&nbsp;Mole of&nbsp;<\/mtext><mi>NaOH<\/mi><\/mrow><mrow><mtext>&nbsp;Mass of solvent&nbsp;<\/mtext><mo>(<\/mo><mi>kg<\/mi><mo>)<\/mo><\/mrow><\/mfrac><\/mstyle><\/math><\/p><p><math style=\"font-family:Arial;\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mstyle mathsize=\"16px\"><mtable columnalign=\"left\"><mtr><mtd><mo>=<\/mo><mfrac><mn>2<\/mn><mrow><mn>1<\/mn><mo>.<\/mo><mn>2<\/mn><\/mrow><\/mfrac><\/mtd><\/mtr><mtr><mtd><mo>=<\/mo><mn>1<\/mn><mo>.<\/mo><mn>67<\/mn><mo>&nbsp;<\/mo><mi mathvariant=\"normal\">m<\/mi><\/mtd><\/mtr><\/mtable><\/mstyle><\/math><\/p>","subject":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The density of 2 M aqueous solution of NaOH is 1.28 g\/cm3. 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