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anap
@anap
January 2021
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Bonjour; à toutes et à tous ,je dois rendre un exercice (exo 3) de chimie ce mercredi à 10h, je bosse depuis 5 jours dessus sans trouver comment je dois le faire.
Est-ce qu'un d'entre vous pourrez me le faire.
question 2 à 3
Merci d'avance
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MichaelS
Verified answer
Bonjour,
2)a)
[H⁺] x [OH⁻] = 10⁻¹⁴
tu connais [OH⁻], tu peux en déduire [H⁺]
b)
Ph = -ln([H⁺])
c)
Ph < 7 : acide
Ph = 7 : neutre
Ph > 7 : basique
3)
Si on dilue une solution acide: son Ph augmente
Si on dilue une solution basique : son Ph diminue
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Verified answer
Bonjour,2)a)
[H⁺] x [OH⁻] = 10⁻¹⁴
tu connais [OH⁻], tu peux en déduire [H⁺]
b)
Ph = -ln([H⁺])
c)
Ph < 7 : acide
Ph = 7 : neutre
Ph > 7 : basique
3)
Si on dilue une solution acide: son Ph augmente
Si on dilue une solution basique : son Ph diminue