{"common":{"save":0,"post_id":"8579","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8009","post_id":"8579","mon_id":"1159539","chapter_id":"1159543","question":"<p>Cho dung d\u1ecbch KOH vào \u1ed1ng nghi\u1ec7m \u0111\u1ef1ng dung d\u1ecbch FeCl3, hi\u1ec7n t\u01b0\u1ee3ng quan sát \u0111\u01b0\u1ee3c là:<\/p>","options":["A. Có k\u1ebft t\u1ee7a tr\u1eafng xanh.","B. Có khí thoát ra.","C. Có k\u1ebft t\u1ee7a \u0111\u1ecf nâu.","D. K\u1ebft t\u1ee7a màu tr\u1eafng."],"correct":"3","level":"3","hint":"<p>Ph\u1ea3n \u1ee9ng x\u1ea3y ra gi\u1eefa KOH và FeCl\u2083 t\u1ea1o ra m\u1ed9t h\u1ee3p ch\u1ea5t k\u1ebft t\u1ee7a có màu \u0111\u1eb7c tr\u01b0ng c\u1ee7a ion Fe³\u207a trong môi tr\u01b0\u1eddng ki\u1ec1m.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>C. Có k\u1ebft t\u1ee7a \u0111\u1ecf nâu.<\/strong><\/p><p>Fe(OH)\u2083 là ch\u1ea5t k\u1ebft t\u1ee7a có màu \u0111\u1ecf nâu, \u0111\u1eb7c tr\u01b0ng c\u1ee7a ion Fe³\u207a trong môi tr\u01b0\u1eddng ki\u1ec1m.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-03-04 22:40:05","option_type":"txt","len":2},{"id":"8010","post_id":"8579","mon_id":"1159539","chapter_id":"1159543","question":"<p>N\u1ebfu ch\u1ec9 dùng dung d\u1ecbch NaOH thì có th\u1ec3 phân bi\u1ec7t \u0111\u01b0\u1ee3c 2 dung d\u1ecbch mu\u1ed1i trong m\u1ed7i c\u1eb7p ch\u1ea5t sau:<\/p>","options":["A. Na2SO4 và Fe2(SO4)3","B. Na2SO4 và K2SO4","C. Na2SO4 và BaCl2","D. Na2CO3 và K3PO4"],"correct":"1","level":"3","hint":"<p data-end=\"177\" data-start=\"39\">Hãy suy ngh\u0129 v\u1ec1 ph\u1ea3n \u1ee9ng c\u1ee7a NaOH v\u1edbi t\u1eebng dung d\u1ecbch mu\u1ed1i. Xem xét hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o k\u1ebft t\u1ee7a ho\u1eb7c thay \u0111\u1ed5i màu s\u1eafc \u0111\u1ec3 nh\u1eadn bi\u1ebft s\u1ef1 khác bi\u1ec7t.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>A. Na2SO4 và Fe2(SO4)3<\/strong><\/p><p>- NaOH ph\u1ea3n \u1ee9ng v\u1edbi <strong data-end=\"285\" data-start=\"272\">Fe\u2082(SO\u2084)\u2083<\/strong>, t\u1ea1o k\u1ebft t\u1ee7a Fe(OH)\u2083 màu nâu \u0111\u1ecf.<\/p><p>- Na\u2082SO\u2084 không ph\u1ea3n \u1ee9ng v\u1edbi NaOH → Phân bi\u1ec7t \u0111\u01b0\u1ee3c.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-03-04 22:41:32","option_type":"txt","len":2},{"id":"8011","post_id":"8579","mon_id":"1159539","chapter_id":"1159543","question":"<p>Tr\u1ed9n 2 dung d\u1ecbch nào sau \u0111ây s\u1ebd không xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a?<\/p>","options":["A. BaCl2, Na2SO4","B. Na2CO3, Ba(OH)2","C. BaCl2, AgNO3","D. NaCl, K2SO4"],"correct":"4","level":"3","hint":"<p>Xác \u0111\u1ecbnh ion có th\u1ec3 t\u1ea1o k\u1ebft t\u1ee7a d\u1ef1a vào b\u1ea3ng tính tan c\u1ee7a mu\u1ed1i và baz\u01a1.<\/p>","answer":"<p>\u0110áp án \u0111úng:<strong> D. NaCl, K2SO4<\/strong><\/p><p>- Khi tr\u1ed9n các dung d\u1ecbch, n\u1ebfu có c\u1eb7p ion t\u1ea1o h\u1ee3p ch\u1ea5t không tan, k\u1ebft t\u1ee7a s\u1ebd xu\u1ea5t hi\u1ec7n.<\/p><p>- A: BaSO4\u200b (không tan) → có k\u1ebft t\u1ee7a.<\/p><p>- B: BaCO3\u200b (không tan) → có k\u1ebft t\u1ee7a.<\/p><p>- C: AgCl (không tan) → có k\u1ebft t\u1ee7a.<\/p><p>- D: NaCl và K2\u200bSO4\u200b \u0111\u1ec1u tan hoàn toàn → không có k\u1ebft t\u1ee7a.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-03-04 22:43:28","option_type":"txt","len":2}]}
