Reactions: Please also write equation of state.?

complete the following reaction whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical formula.

(i) magnesium chloride + sodium hydroxide

(ii) manganese(II) chloride + cadmium nitrate

(iii) potassium chloride + ammonium nitrate

Please also write equation of state. (aq), (s),

2 Answers

  • Dr W
    Lv 7
    6 months ago

    Read through pisgachemists answer.  AND one other thing.  You need to stop calling that (aq), (s), (l), (g) ,etc an "equation of state"  That term is reserved for something else.  Those letters are called "physical states" (not equations of state)

    And we typically ask students to include the "state" of the chemical when we should probably as for "physical state".  

    If you heard that term from your instructor, please correct them.  It's discussed in every general chemistry book out there so you shouldn't have a difficult time convincing him/her (if that's the case)

  • 6 months ago

    Chemical equations ....

    You need to learn how to write the formulas and to use the solubility rules.

    MgCl2(aq) + 2NaOH(aq) --> Mg(OH)2(s) + 2NaCl(aq)

    MnCl2(aq) + Cd(NO3)2(aq) --> no reaction

    KCl(aq) + NH4NO3(aq) --> no reaction

    You can't write the formulas of products when there is no reaction.  For instance, it would be silly to write:

    MnCl2(aq) + Cd(NO3)2(aq) --> CdCl2(aq) +Mn(NO3)2(aq)

    There are NO SUCH PRODUCTS!!!  You start with four ions in solution and none of them combine to make insoluble products.

    If your teacher wants the following, then they don't know what they are talking about (and probably wasn't trained as a chemist).

    MnCl2(aq) + Cd(NO3)2(aq) --> CdCl2(aq) +Mn(NO3)2(aq)

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