{"common":{"save":0,"post_id":"9052","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6865","post_id":"9052","mon_id":"1159892","chapter_id":"1159938","question":"<p data-pm-slice=\"1 1 []\">\u0110\u1ec3 pha loãng dung d\u1ecbch H2SO4 \u0111\u1eb7c, ng\u01b0\u1eddi ta dùng cách nào sau \u0111ây?<\/p>","options":["A. Rót nhanh dung d\u1ecbch H2SO4 \u0111\u1eb7c vào n\u01b0\u1edbc.","B. Rót t\u1eeb t\u1eeb n\u01b0\u1edbc vào dung d\u1ecbch H2SO4 \u0111\u1eb7c.","C. Rót t\u1eeb t\u1eeb dung d\u1ecbch H2SO4 \u0111\u1eb7c vào n\u01b0\u1edbc, khu\u1ea5y \u0111\u1ec1u.","D. Rót nhanh n\u01b0\u1edbc vào H2SO4 \u0111\u1eb7c, \u0111un nóng."],"correct":"3","level":"1","hint":"<p>Khi pha loãng ph\u1ea3i rót axit \u0111\u1eb7c vào n\u01b0\u1edbc t\u1eeb t\u1eeb, không làm ng\u01b0\u1ee3c l\u1ea1i.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>C. Rót t\u1eeb t\u1eeb dung d\u1ecbch H2SO4 \u0111\u1eb7c vào n\u01b0\u1edbc, khu\u1ea5y \u0111\u1ec1u.<\/strong><\/span><\/p><p><strong data-end=\"97\" data-start=\"38\">Pha H2SO4 \u0111\u1eb7c ph\u1ea3i rót t\u1eeb t\u1eeb axit vào n\u01b0\u1edbc và khu\u1ea5y \u0111\u1ec1u<\/strong> \u0111\u1ec3 tránh t\u1ecfa nhi\u1ec7t m\u1ea1nh gây b\u1eafn tung tóe, r\u1ea5t nguy hi\u1ec3m.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-27 14:52:07","option_type":"txt","len":3},{"id":"6866","post_id":"9052","mon_id":"1159892","chapter_id":"1159938","question":"<p data-pm-slice=\"0 0 []\">Oleum có công th\u1ee9c t\u1ed5ng quát là<\/p>","options":["A. H2SO4.nSO2.","B. H2SO4.nH2O.","C. H2SO4.nSO3.","D. H2SO4 \u0111\u1eb7c."],"correct":"3","level":"1","hint":"<p>Nh\u1edb công th\u1ee9c chung c\u1ee7a oleum ch\u1ee9a H\u2082SO\u2084 và SO\u2083.<\/p>","answer":"<p>\u0110áp án \u0111úng:<span style=\"color:#16a085;\"> <strong>C. H2SO4.nSO3.<\/strong><\/span><\/p><p><strong data-end=\"47\" data-start=\"38\">Oleum<\/strong> là dung d\u1ecbch <strong data-end=\"70\" data-start=\"61\">H\u2082SO\u2084<\/strong> hòa tan thêm <strong data-end=\"91\" data-start=\"84\">SO\u2083<\/strong>, nên công th\u1ee9c t\u1ed5ng quát là <strong data-end=\"134\" data-start=\"120\">H\u2082SO\u2084.nSO\u2083<\/strong>.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-27 14:52:49","option_type":"txt","len":1},{"id":"6867","post_id":"9052","mon_id":"1159892","chapter_id":"1159938","question":"<p data-pm-slice=\"0 0 []\">Sulfuric acid loãng tác d\u1ee5ng v\u1edbi Fe t\u1ea1o thành s\u1ea3n ph\u1ea9m:<\/p>","options":["A. Fe2(SO4)3 và H2.","B. FeSO4 và H2.","C. FeSO4 và SO2.","D. Fe2(SO4)3 và SO2."],"correct":"2","level":"1","hint":"<p>Xem tính kh\u1eed c\u1ee7a Fe v\u1edbi H\u2082SO\u2084 loãng t\u1ea1o mu\u1ed1i và khí hi\u0111ro.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>B. FeSO4 và H2.<\/strong><\/span><\/p><p><strong data-end=\"53\" data-start=\"38\">H\u2082SO\u2084 loãng<\/strong> tác d\u1ee5ng v\u1edbi <strong data-end=\"73\" data-start=\"67\">Fe<\/strong> t\u1ea1o <strong data-end=\"87\" data-start=\"78\">FeSO\u2084<\/strong> và gi\u1ea3i phóng <strong data-end=\"108\" data-start=\"102\">H\u2082<\/strong> theo ph\u1ea3n \u1ee9ng:<br data-end=\"126\" data-start=\"123\" \/>Fe + H\u2082SO\u2084 → FeSO\u2084 + H\u2082↑.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-27 14:53:26","option_type":"txt","len":2}]}
