LEMBAR SOAL UJIAN PRAKTIKTAHUN PELAJARAN 2011-2012

Bidang Keahlian : Tehnik TelekomunikasiProgram Keahlian : Semua program keahlianMata Diklat : KimiaMata Uji : Laju ReaksiAlokasi Waktu : 15 Menit

Nama

No. Ujian

Kelas

Hari/Tanggal

PERCOBAAN : PENGARUH KONSENTRASI DAN LUAS PERMUKAAN BIDANG SENTUH TERHADAP LAJU REAKSI

A. Tujuan PercobaanMengetahui pengaruh konsentrasi dan luas permukaan bidang sentuh terhadap laju reaksi

B. Lembar Kerja Alat dan bahan

Tabung reaksi Stop watch Rak tabung reaksi Larutan HCl 1 M Pipet Larutan HCl 2 M Gelas ukur Pita Magnesium

Langkah Kerja

1. Ambil 5 ml larutan HCl 1 M, masukkan kedalam tabung reaksi 1!2. Ambil 5 ml larutan HCl 2 M, masukkan kedalam tabung reaksi 2!3. Masukkan 1 potong pita Mg kedalam tabung reaksi 1 dan catat waktu yang diperlukan

sehingga pita Mg habis bereaksi!4. Masukkan 1 potong pita Mg kedalam tabung reaksi 2 dan catat waktu yang diperlukan

sehingga pita Mg habis bereaksi

Tabel Hasil Pengamatan

No Larutan Waktu setelah pita Mg habis bereaksi1 HCl 1 M2 HCl 2 M

C. Tugas1. Faktor-faktor apa saja yang mempengaruhi laju reaksi? Jelaskan!

2. Dari hasil percobaan pita Mg akan lebih cepat bereaksi dengan HCl 1 M atau HCl 2 M,

jelaskan, mengapa?

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