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Pertanyaan

Sebanyak 100 mL larutan MgCl2 0,4 M ditambahkan ke dalam 100 mL larutan Na2CO3 0,4 M. Besarnya massa zat yang mengendap jika diketahui Ksp MgCO33 space x space 10 to the power of negative 8 end exponent dan Ar Mg=24, C=12, O=16 adalah ….

  1. 1,68 gram

  2. 3,36 gram

  3. 6,72 gram

  4. 8,40 gram

  5. 84,00 gram

S. Utari

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

Jawaban terverifikasi

Pembahasan

space space space space space space M g C l subscript 2 space space space space space space space space space space space space space plus space space space space space space space space space N a subscript 2 C O subscript 3 space space space space space space space space space space space space space space space space space space space end subscript space rightwards arrow space space space space space M g C O subscript 3 space end subscript space space space plus space space space space 2 space N a C l  M space equals space 0 comma 4 space M space x space 100 space m L space space space space space space space space 0 comma 4 M space x space 100 space m L space space space space space space space space space space space space space space space space space space minus space space space space space space space space space space space space space space space space space space space space space space space minus  space space space space space equals space 40 space m m o l space space space space space space space space space space space space space space space space space space space space equals space 40 space m m o l  R space equals space 40 space m m o l space space space space space space space space space space space space space space space space space space space space space space equals space 40 space m m o l space space space space space space space space space space space space space space space space space space space 40 space m m o l space space space space space space space space space space 80 space m m o l  top enclose S space equals space space space space space space space minus space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space minus space space space space space space space space space space space space space space space space space space space space space space space space space space space space 40 space m m o l space space space space space space space space space space 80 space m m o l space end enclose    Ditanya space colon space massa space endapan space MgCO subscript 3 ?  Mmol space sisa space untuk space MgCO subscript 3 space adalah space 40 space mmol    Mol space MgCO subscript 3 space space equals space fraction numerator g r a m italic space M g C O subscript italic 3 over denominator M r end fraction  4 space straight x space 10 to the power of negative 2 end exponent space mol space equals fraction numerator gram italic space MgCO subscript italic 3 over denominator 84 end fraction  gram space MgCO subscript 3 space equals space space 4 space straight x space 10 to the power of negative 2 end exponent space mol space straight x space 84 space equals space 3 comma 36 space gram

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