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LittleDream
@LittleDream
June 2021
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SVP C'EST MON DERNIER PROBLÈME, AIDEZ-MOI :(
d'hydroxyde de sodium ,NaOH ,contenue dans 500 ml de solution 1M est ?
Propositions;
a.400g
b.40 g
c.20g
d.2g
Je comprend rien du tout :(((
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Tu dois commencer par calculer la masse molaire du NaOH : 23 (Na) + 16(O) + 1(H) = 40 g.mol
Tu veux une solution à une mole par litre, une mole correspond a 40 g de NaOH.
Donc pour 500 mL il te faut 20 g de NaOH
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Thanks 1
LittleDream
merci
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Tu veux une solution à une mole par litre, une mole correspond a 40 g de NaOH.
Donc pour 500 mL il te faut 20 g de NaOH