Suppose you have a solution that might contain any or all of the following cations: Ni2+, Ag+, Sr2+, and Mn2+. Addition of HCl solution causes a precipitate to form. After filtering off the precipitate, H2SO4 solution is added to the resultant solution and another precipitate forms. This is filtered off, and a solution of NaOH is added to the resulting solution. No precipitate is observed.

Question

Chemistry

Reilly Mack

20 September, 19:44

Suppose you have a solution that might contain any or all of the following cations: Ni2+, Ag+, Sr2+, and Mn2+. Addition of HCl solution causes a precipitate to form. After filtering off the precipitate, H2SO4 solution is added to the resultant solution and another precipitate forms. This is filtered off, and a solution of NaOH is added to the resulting solution. No precipitate is observed.

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Jimmuy · Answer 1

Ni2+, Ag+, Sr2+, and Mn2+, & with the Addition of HCl - - > AgCl ppts

Ni2+, Sr2+, and Mn2+, & with the Addition of H2SO4 - - > SrSO4 ppts

Ni2+, and Mn2+, & with the Addition of NaOH - - > both Mn (OH) 2 & Ni (OH) 2 would have ppt'd

but since no ppt, ...

there was no Ni+2 or Mn+2

your answers are

Ag + & Sr+2 were present

&

Ni+2 & Mn+2 were not present