Tốc độ phản ứng và chất xúc tác

Home Lớp 8 Khoa học tự nhiên 8 - sách Kết nối tri thức Bài 7: Tốc độ phản ứng và chất xúc tácBài tập nâng cao

{"common":{"save":0,"post_id":"8551","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7742","post_id":"8551","mon_id":"1159539","chapter_id":"1159541","question":"Hoàn thành phát bi\u1ec3u v\u1ec1 t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng sau: "T\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh b\u1edfi \u0111\u1ed9 bi\u1ebfn thiên ...(1)... c\u1ee7a ...(2)... trong m\u1ed9t \u0111\u01a1n v\u1ecb ...(3)..."<\/p>","options":["A. (1) n\u1ed3ng \u0111\u1ed9, (2) m\u1ed9t ch\u1ea5t ph\u1ea3n \u1ee9ng ho\u1eb7c s\u1ea3n ph\u1ea9m, (3) th\u1ec3 tích.","B. (1) n\u1ed3ng \u0111\u1ed9, (2) m\u1ed9t ch\u1ea5t ph\u1ea3n \u1ee9ng ho\u1eb7c s\u1ea3n ph\u1ea9m, (3) th\u1eddi gian.","C. (1) th\u1eddi gian, (2) m\u1ed9t ch\u1ea5t s\u1ea3n ph\u1ea9m, (3) n\u1ed3ng \u0111\u1ed9.","D. (1) th\u1eddi gian, (2) các ch\u1ea5t ph\u1ea3n \u1ee9ng, (3) th\u1ec3 tích."],"correct":"2","level":"3","hint":"T\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng liên quan \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i v\u1ec1 n\u1ed3ng \u0111\u1ed9<\/strong> c\u1ee7a ch\u1ea5t ph\u1ea3n \u1ee9ng ho\u1eb7c s\u1ea3n ph\u1ea9m trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh.<\/p>","answer":"\u0110áp án \u0111úng: B. (1) n\u1ed3ng \u0111\u1ed9, (2) m\u1ed9t ch\u1ea5t ph\u1ea3n \u1ee9ng ho\u1eb7c s\u1ea3n ph\u1ea9m, (3) th\u1eddi gian.<\/strong><\/p>T\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh b\u1edfi s\u1ef1 thay \u0111\u1ed5i v\u1ec1 n\u1ed3ng \u0111\u1ed9 c\u1ee7a các ch\u1ea5t ph\u1ea3n \u1ee9ng ho\u1eb7c s\u1ea3n ph\u1ea9m trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 10:48:13","option_type":"txt","len":3},{"id":"7745","post_id":"8551","mon_id":"1159539","chapter_id":"1159541","question":"Trong phòng thí nghi\u1ec7m, có th\u1ec3 \u0111i\u1ec1u ch\u1ebf khí oxi t\u1eeb mu\u1ed1i kali clorat. Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng cách nào sau \u0111ây nh\u1eb1m m\u1ee5c \u0111ích t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng?<\/p>","options":["A. Nung kaliclorat \u1edf nhi\u1ec7t \u0111\u1ed9 cao.","B. Nung h\u1ed7n h\u1ee3p kali clorat và mangan \u0111ioxit \u1edf nhi\u1ec7t \u0111\u1ed9 cao.","C. Dùng ph\u01b0\u01a1ng pháp d\u1eddi n\u01b0\u1edbc \u0111\u1ec3 thu khí oxi.","D. Dùng ph\u01b0\u01a1ng pháp d\u1eddi không khí \u0111\u1ec3 thu khí oxi."],"correct":"2","level":"3","hint":"Hãy suy ngh\u0129 v\u1ec1 ph\u01b0\u01a1ng pháp nào giúp t\u0103ng t\u1ed1c ph\u1ea3n \u1ee9ng phân h\u1ee7y kali clorat và t\u1ea1o ra khí oxi nhanh h\u01a1n.<\/p>","answer":"\u0110áp án \u0111úng: B. Nung h\u1ed7n h\u1ee3p kali clorat và mangan \u0111ioxit \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/strong><\/p>Mangan \u0111ioxit là ch\u1ea5t xúc tác giúp ph\u1ea3n \u1ee9ng phân h\u1ee7y kali clorat nhanh h\u01a1n mà không b\u1ecb tiêu hao trong ph\u1ea3n \u1ee9ng.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 10:49:48","option_type":"txt","len":3},{"id":"7747","post_id":"8551","mon_id":"1159539","chapter_id":"1159541","question":"Cho ph\u1ea3n \u1ee9ng phân hu\u1ef7 hi\u0111ro peoxit trong dung d\u1ecbch: 2H$_{2}$<\/span>O$_{2}$<\/span> -> 2H$_{2}$<\/span>O + O$_{2}$<\/span>. Y\u1ebfu t\u1ed1 \u1ea3nh không h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng là:<\/p>","options":["A. N\u1ed3ng \u0111\u1ed9 H$_{2}$<\/span>O$_{2}$<\/span>","B. Th\u1eddi gian","C. Nhi\u1ec7t \u0111\u1ed9.","D. Ch\u1ea5t xúc tác MnO$_{2}$<\/span>"],"correct":"2","level":"3","hint":"\u0110\u1ec3 xác \u0111\u1ecbnh y\u1ebfu t\u1ed1 không \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng, b\u1ea1n c\u1ea7n xem xét các y\u1ebfu t\u1ed1 liên quan \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng nh\u01b0 n\u1ed3ng \u0111\u1ed9, nhi\u1ec7t \u0111\u1ed9, ch\u1ea5t xúc tác và th\u1eddi gian.<\/p>","answer":"\u0110áp án \u0111úng: B. Th\u1eddi gian<\/strong><\/p>Th\u1eddi gian không tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng, mà ch\u1ec9 là k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 ph\u1ea3n \u1ee9ng. Các y\u1ebfu t\u1ed1 nh\u01b0 n\u1ed3ng \u0111\u1ed9 H$_{2}$<\/span>O$_{2}$<\/span>, nhi\u1ec7t \u0111\u1ed9, và ch\u1ea5t xúc tác \u0111\u1ec1u có tác \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 phân hu\u1ef7 c\u1ee7a H$_{2}$<\/span>O$_{2}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 10:53:47","option_type":"math","len":0}]}