Ôn tập chương 1

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{"common":{"save":0,"post_id":"8916","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6630","post_id":"8916","mon_id":"1159892","chapter_id":"1159893","question":"Hòa tan hoàn toàn 12,4 gam Na2O vào n\u01b0\u1edbc d\u01b0 thu \u0111\u01b0\u1ee3c 500 ml dung d\u1ecbch X. N\u1ed3ng \u0111\u1ed9 mol c\u1ee7a cation trong X là<\/p>","options":["A. 0,4M.","B. 0,8M.","C. 0,2M.","D. 0,5M."],"correct":"2","level":"3","hint":"","answer":"\u0110áp án \u0111úng: B. 0,8M.<\/strong><\/p>Na2O + H2O → 2NaOH<\/p>0,2                     0,4 mol<\/p>NaOH → Na+ + OH−<\/p>0,8         0,8 M.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-20 14:48:49","option_type":"txt","len":0},{"id":"6631","post_id":"8916","mon_id":"1159892","chapter_id":"1159893","question":"Cho các ch\u1ea5t d\u01b0\u1edbi \u0111ây: HClO4, HClO, HF, HNO3, H2S, H2SO3, NaOH, NaCl, CuSO4, CH3COOH. S\u1ed1 ch\u1ea5t thu\u1ed9c lo\u1ea1i ch\u1ea5t \u0111i\u1ec7n li m\u1ea1nh là<\/p>","options":["A. 5.","B. 6.","C. 7.","D. 4."],"correct":"1","level":"3","hint":"","answer":"\u0110áp án \u0111úng: A. 5.<\/strong><\/p>HClO\u2084<\/strong> → Axit m\u1ea1nh<\/strong> <\/p>HClO<\/strong> → Axit y\u1ebfu<\/strong> <\/p>HF<\/strong> → Axit y\u1ebfu<\/strong> <\/p>HNO\u2083<\/strong> → Axit m\u1ea1nh<\/strong> <\/p>H\u2082S<\/strong> → Axit y\u1ebfu<\/strong> <\/p>H\u2082SO\u2083<\/strong> → Axit y\u1ebfu<\/strong><\/p>NaOH<\/strong> → Baz\u01a1 m\u1ea1nh<\/strong> <\/p>NaCl<\/strong> → Mu\u1ed1i tan<\/strong> <\/p>CuSO\u2084<\/strong> → Mu\u1ed1i tan<\/strong> <\/p>CH\u2083COOH<\/strong> → Axit y\u1ebfu<\/strong> <\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-20 14:50:21","option_type":"txt","len":0},{"id":"6632","post_id":"8916","mon_id":"1159892","chapter_id":"1159893","question":"Dung d\u1ecbch ch\u1ea5t nào sau \u0111ây làm xanh qu\u1ef3 tím?<\/p>","options":["A. HCl.","B. Na2SO4.","C. NaOH.","D. KCl."],"correct":"3","level":"3","hint":"","answer":"\u0110áp án \u0111úng: C. NaOH.<\/strong><\/p>HCl<\/strong> → axit m\u1ea1nh → làm qu\u1ef3 tím chuy\u1ec3n \u0111\u1ecf<\/strong> <\/p>Na\u2082SO\u2084<\/strong> → mu\u1ed1i trung tính → không \u0111\u1ed5i màu qu\u1ef3 tím<\/strong> <\/p>KCl<\/strong> → mu\u1ed1i trung tính → không \u0111\u1ed5i màu qu\u1ef3 tím<\/strong> <\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-20 14:55:46","option_type":"txt","len":0}]}