Prosedur Kerja Praktikum Kimia, "Pengaruh Konsentrasi pada Laju Reaksi"

LAJU REAKSI

(Pengaruh Konsentrasi terhadap laju reaksi)

Standar Kompetensi   Memahami kinetika reaksi, kesetimbangan kimia, dan faktor-faktor yang mempengaruhinya, serta penerapannya dalam kehidupan sehari-hari dan industri

Kompetensi dasar:      memahami teori tumbukan (tabrakan) untuk menjelaskan factor-faktor penentu laju dan orde- reaksi serta terapannya dalam kehidupan sehari-hari

Indikator                     Menjelaskan pengaruh konsentrasi, luas permukaan bidang sentuh, dan suhu terhadap laju reaksi berdasarkan teori tumbukan

        

Alat dan bahan

         Alat:

1.      gelas kimia

2.      gelas ukur

3.      stop watch

4.      kertas putih

Bahan:

1.      Larutan HCl 1 M

2.      Larutan Na₂S₂O₃  0,25 M

3.      Larutan Na₂S₂O₃  0,5 M

4.      Larutan Na₂S₂O₃  1 M

Prosedur:

1.      Masukan 5 ml HCl 1 M ke dalam gelas kimia dan letakan diatas kertas putih yang sudah dibubuhi tanda silang (X)

2.      Tambahkan 20 ml larutan  Na₂S₂O₃  1 M sambil mencatat waktu saat penambahan Na₂S₂O₃  1 M sampai tanda silang (X) tidak terlihat lagi (dilihat dengan tegak)

3.      Ulangi percobaan tadi dengan Na₂S₂O₃  0,5 M dan 0,25 M dengan volume dan konsentrasi HCl tetap

Pengamatan:

No.	Volume HCl 1 M	Volume Na2S2O3	Konsentrasi Na2S2O3	Waktu (detik)
1. 2. 3.	………  ml ………  ml ………  ml	………  ml ………  ml ………  ml	………  M ………  M ………  M	………  detik ………  detik ………  detik

Pertanyaan:

         1. Berdasarkan  data pengamatan, bagaimanakah pengaruh konsentrasi terhadap laju    reaksi ?

         2.   Buatlah grafik perubahan konsentrasi versus waktu !

t     0           ‘            ‘              ‘               ‘             Konsentrasi Na2S2O3

3.      Buatlah Kesimpulan hasil praktek

SELAMAT BEKERJA

LEMBAR KERJA SISWA

NAMA                                    :  .............................................

MATA PELAJARAN                        :  .............................................

KELAS/PROGRAM              :  .............................................

PAKET SOAL                       :  ..............................................

Judul Praktek                        :

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Alat dan Bahan         :

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Hasil Pengamatan     :

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Jawaban Pertanyaan            :

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PENILAIAN
Sikap Ilmiah
Kinerja Ilmiah
Jawaban pertanyaan
Nilai Rata-rata