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Kevin
Kevin asked in Science & MathematicsChemistry · 1 week ago

Chemistry questions?

If 2.00 mL of 0.200 M NaOH are added to 1.00 L of 0.100 M CaCl2, will a precipitate form? (3)

Ksp of Ca(OH)2 is 8.0 x 10-6 Assume both the base and the salt will dissociate completely. Don’t forget to calculate Q.

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  • hcbiochem
    Lv 7
    1 week ago

    [OH-] = 2 mL X 0.200 M / 1000 mL = 4.00X10^-4 M

    [Ca2+] = 1.0 X 0.1 / 1.002  = 0.0998 MQ = [Ca2+][OH-]^2

    Q = (0.0998) (4.00X10^-4)^2 = 1.6X10^-8

    Because Q < Ksp, no precipitate will form

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