Quiz — série8 pH T.pdf

Question 1 sur 10 20:00

[{"id":23189,"question":"Quel est le pH d'une solution neutre ?","option_a":"0","option_b":"7","option_c":"14","option_d":"1","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une solution neutre a un pH de 7, ce qui signifie qu'elle contient autant d'ions H+ que d'ions OH-.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"0\", \"b\": \"7\", \"c\": \"14\", \"d\": \"1\"}}","_debug_options_count":4},{"id":23190,"question":"Un pH de 3 indique une solution...","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un pH de 3 est acide car il est inférieur à 7. Une solution acide a un pH \u003C 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":23191,"question":"Quel indicateur coloré devient rose en milieu basique ?","option_a":"Bleu de bromophénol","option_b":"Phénolphtaléine","option_c":"Hélianthine","option_d":"Papier pH","option_e":"","option_f":"","bonne_reponse":"b","explication":"La phénolphtaléine est incolore en milieu acide et devient rose en milieu basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Bleu de bromophénol\", \"b\": \"Phénolphtaléine\", \"c\": \"Hélianthi","_debug_options_count":4},{"id":23192,"question":"Le pH d'une solution peut-il être négatif ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Non, le pH est toujours compris entre 0 et 14, même si les solutions très acides ont un pH proche de 0.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":23193,"question":"Quelle est la formule du pH pour une solution d'acide fort ?","option_a":"pH = -log[H+]","option_b":"pH = log[H+]","option_c":"pH = [H+]","option_d":"pH = 14 - pOH","option_e":"","option_f":"","bonne_reponse":"a","explication":"Pour un acide fort, le pH se calcule par pH = -log[H+], où [H+] est la concentration en ions hydrogène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"pH = -log[H+]\", \"b\": \"pH = log[H+]\", \"c\": \"pH = [H+]\", \"d\": \"pH =","_debug_options_count":4},{"id":23194,"question":"Un pH de 9 correspond à une solution...","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un pH de 9 est basique car il est supérieur à 7. Une solution basique a un pH \u003E 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":23195,"question":"Quel est l'ion responsable de l'acidité d'une solution ?","option_a":"Cl-","option_b":"Na+","option_c":"H+","option_d":"OH-","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'ion H+ (ion hydrogène) est responsable de l'acidité d'une solution.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Cl-\", \"b\": \"Na+\", \"c\": \"H+\", \"d\": \"OH-\"}}","_debug_options_count":4},{"id":23196,"question":"Le papier pH permet de mesurer le pH avec précision.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le papier pH donne une estimation du pH, mais un pH-mètre est plus précis pour une mesure exacte.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":23197,"question":"Quelle est la relation entre pH et pOH dans une solution aqueuse ?","option_a":"pH + pOH = 14","option_b":"pH = pOH","option_c":"pH - pOH = 7","option_d":"pH * pOH = 1","option_e":"","option_f":"","bonne_reponse":"a","explication":"Dans une solution aqueuse à 25°C, la somme du pH et du pOH est toujours égale à 14.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"pH + pOH = 14\", \"b\": \"pH = pOH\", \"c\": \"pH - pOH = 7\", \"d\": \"pH * ","_debug_options_count":4},{"id":23198,"question":"Une solution de soude (NaOH) a un pH de 13. Quel est son caractère ?","option_a":"Acide","option_b":"Neutre","option_c":"Basique","option_d":"Amphotère","option_e":"","option_f":"","bonne_reponse":"c","explication":"Une solution de soude (NaOH) est une base forte, donc son pH de 13 indique un caractère basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Acide\", \"b\": \"Neutre\", \"c\": \"Basique\", \"d\": \"Amphotère\"}}","_debug_options_count":4}]