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Exercício de Atividades Sobre Soluções
Exercício:
1- Em 200 mL de solução existem 10g de soluto.qual é o titulo da solução , sabendo quesua densidade é 1,5g/mL?
2- Qual é a molaridade de uma solução de hidroxido de potassio que encerra 11,2g da base de 500mL de solução?
Informações Adicionais:
plz preciso pra hj antes da aula
1 – Verificando-se que a cada mL temos 1,5g. Logo em 200mL temos 300g de solução.
Título, é a massa de soluto/ massa de solução+massa de soluto.
Logo, 10/10+300 = 10/310 = 1/31. Titulo da solução é 1/31
Nota-se que ‘título’ não recebe unidade.
2 – Bem,
n=m/MM -> n = 11,2/36 -> n = 0,3 mol.
Molaridade é numero de mols/volume
M = 0,3/500 = 0,0006 mol/mL
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