{"common":{"save":0,"post_id":"7929","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8454","post_id":"7929","mon_id":"1159533","chapter_id":"1159574","question":"<p>Mu\u1ed1n \u0111i\u1ec1u ch\u1ebf 20 mL ethylic alcohol 60o s\u1ed1 mL ethylic alcohol và s\u1ed1 mL n\u01b0\u1edbc c\u1ea7n dùng là:<\/p>","options":["<strong>A. <\/strong>10 mL ethylic alcohol và 10 mL n\u01b0\u1edbc","<strong>B. <\/strong>12 mL ethylic alcohol và 8 mL n\u01b0\u1edbc","<strong>C. <\/strong>14 mL ethylic alcohol và 6 mL n\u01b0\u1edbc","<strong>D. <\/strong>8 mL ethylic alcohol và 12 mL n\u01b0\u1edbc"],"correct":"2","level":"3","hint":"<p>- N\u1ed3ng \u0111\u1ed9 <strong>60°<\/strong> c\u1ee7a ethylic alcohol có ngh\u0129a là dung d\u1ecbch ch\u1ee9a <strong>60% th\u1ec3 tích là ethylic alcohol<\/strong> và <strong>40% th\u1ec3 tích là n\u01b0\u1edbc<\/strong>.<\/p><p>- T\u1ed5ng th\u1ec3 tích dung d\u1ecbch là <strong>20 mL<\/strong>.<\/p><p>- Tính l\u01b0\u1ee3ng ethylic alcohol và l\u01b0\u1ee3ng n\u01b0\u1edbc c\u1ea7n thi\u1ebft d\u1ef1a vào t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m này.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>B. 12 mL ethylic alcohol và 8 mL n\u01b0\u1edbc<\/strong><\/span><\/p><p>\u0110\u1ed9 r\u01b0\u1ee3u là th\u1ec3 tích c\u1ee7a ancol nguyên ch\u1ea5t trong 100 th\u1ec3 tích dung d\u1ecbch ancol.<\/p><p>V\u1edbi dung d\u1ecbch r\u01b0\u1ee3u là 20ml \u0111\u1ed9 r\u01b0\u1ee3u là 60<span class=\"math-tex\">$^0$<\/span> → th\u1ec3 tích r\u01b0\u1ee3u nguyên ch\u1ea5t là 20. 60 : 100 = 12 ml<\/p><p>→ S\u1ed1 ml n\u01b0\u1edbc là 20 – 12 = 8 ml<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-08 23:33:37","option_type":"txt","len":2},{"id":"8455","post_id":"7929","mon_id":"1159533","chapter_id":"1159574","question":"<p>\u1ee8ng v\u1edbi công th\u1ee9c phân t\u1eed C<span class=\"math-tex\">$_{4}$<\/span>H<strong><span class=\"math-tex\">$_{10}$<\/span><\/strong>O có bao nhiêu alcohol là công th\u1ee9c c\u1ea5u t\u1ea1o?<\/p>","options":["<strong>A. <\/strong>3","<strong>B. <\/strong>5","<strong>C.<\/strong> 4","<strong>D. <\/strong>2"],"correct":"3","level":"3","hint":"<p>- Alcohol là h\u1ee3p ch\u1ea5t ch\u1ee9a nhóm <strong>-OH<\/strong> (hydroxyl) g\u1eafn vào m\u1ed9t nguyên t\u1eed carbon bão hòa.<\/p><p>- Vi\u1ebft ra các \u0111\u1ed3ng phân alcohol có th\u1ec3 có v\u1edbi 4 nguyên t\u1eed carbon.<\/p><p>- Tính \u0111\u1ebfn các \u0111\u1ed3ng phân m\u1ea1ch th\u1eb3ng và m\u1ea1ch nhánh.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>C. 4<\/strong><\/span><\/p><p>\u1ee8ng v\u1edbi công th\u1ee9c phân t\u1eed C<span class=\"math-tex\">$_{4}$<\/span>H<strong><span class=\"math-tex\">$_{10}$<\/span><\/strong>O có 4 \u0111\u1ed3ng phân alcohol:<\/p><p>CH<span class=\"math-tex\">$_{3}$<\/span>CH<span class=\"math-tex\">$_{2}$<\/span>CH<span class=\"math-tex\">$_{2}$<\/span>CH<span class=\"math-tex\">$_{2}$<\/span>OH; CH<span class=\"math-tex\">$_{3}$<\/span>CH(OH)CH<span class=\"math-tex\">$_{2}$<\/span>CH<span class=\"math-tex\">$_{3}$<\/span>; CH<span class=\"math-tex\">$_{3}$<\/span>-C(OH)(CH<span class=\"math-tex\">$_{3}$<\/span>)<span class=\"math-tex\">$_{2}$<\/span>; CH<span class=\"math-tex\">$_{3}$<\/span>CH(CH<span class=\"math-tex\">$_{3}$<\/span>)CH<span class=\"math-tex\">$_{2}$<\/span>OH.<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-11-08 23:36:14","option_type":"txt","len":0},{"id":"8456","post_id":"7929","mon_id":"1159533","chapter_id":"1159574","question":"<p>Cho ethylic alcohol nguyên ch\u1ea5t tác d\u1ee5ng v\u1edbi potassium. S\u1ed1 ph\u1ea3n \u1ee9ng hóa h\u1ecdc x\u1ea3y ra là:<\/p>","options":["<strong>A.<\/strong> 1","<strong>B.<\/strong> 2","<strong>C.<\/strong> 3","<strong>D.<\/strong> 4"],"correct":"1","level":"3","hint":"<p>Ethanol là m\u1ed9t <strong>alcohol<\/strong> có nhóm <strong>hydroxyl (OH)<\/strong>, và khi ph\u1ea3n \u1ee9ng v\u1edbi kim lo\u1ea1i ki\u1ec1m nh\u01b0 <strong>K<\/strong>, s\u1ebd có m\u1ed9t ph\u1ea3n \u1ee9ng x\u1ea3y ra gi\u1eefa nhóm <strong>OH<\/strong> và <strong>K<\/strong>. Hãy xem xét k\u1ef9 các s\u1ea3n ph\u1ea9m t\u1ea1o ra trong quá trình này.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>A. 1<\/strong><\/span><\/p><p>Ethanol tác d\u1ee5ng v\u1edbi <strong>Potassium kim lo\u1ea1i<\/strong>, gi\u1ea3i phóng khí <strong>hydro (H\u2082)<\/strong> và t\u1ea1o ra <strong>ethoxide potassium (C\u2082H\u2085OK)<\/strong>.<\/p><p>2C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH + 2K → 2C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OK + H<span class=\"math-tex\">$_{2}$<\/span>↑<\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"127","test":"0","date":"2024-11-08 23:40:51","option_type":"txt","len":0}]}