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LEMBAR KERJA SISWA

Nama Anggota Kelompok :

1. ______________________________2. _______________ ______________3. ______________________________4. ______________________________5. ______________________________

TEORI TUMBUKAN

Hari ini kita akan mempelajari tentang teori tumbukan, untuk itu

setelah mempelajari ini kalian harus mampu:

Menjelaskan tentang teori tumbukan (tabrakan) untuk menjelaskan

reaksi kimia melalui diskusi

Menjelaskan pengaruh energi aktivasi terhadap laju reaksi melalui

diskusi.

Menjelaskan pengaruh tumbukan terhadap faktor-faktor penentu laju

reaksi melalui diskusi.

Memahami teori tumbukan (tabrakan) untuk menjelaskan reaksi

kimia melalui hasil diskusi

Menyajikan teori tumbukan (tabrakan) untuk menjelaskan reaksi

kimia melalui kegiatan presentasi di depan kelas

Laju reaksi suatu reaksi kimia dipengaruhi oleh beberapa faktor, yaitu konsentrasi pereaksi,

luas permukaan zat yang bereaksi, suhu pada saat reaksi kimia terjadi, dan ada tidaknya

katalis. Sehubungan dengan proses reaksi kimia, maka ada satu hal penting yang harus

dipelajari untuk menentukan berjalan tidaknya sebuah reaksi kimia, yakni tumbukan. Suatu

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Berdasarkan data hasil praktikum pada pertemuan pertama bahwa :

Factor yang mempengaruhi Laju reaksi

Konsentrasi Besar CepatKecil Lambat

Luas permukaan bidang sentuh

Semakin luas CepatKurang luas Lambat

Suhu Besar CepatKecil Lambat

Katalis Ada CepatTidak ada Lambat

1. Mengapa konsentrasi yang tinggi dapat mempercepat berlangsungnya reaksi ? jelaskan berdasarkan teori tumbukan ! ( Carilah beberapa sumber : buku dan literatur dari internet )........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ .......................................................................................................................................................................................................................................................................................................................................................................

2. Mengapa luas permukaan dapat mempengaruhi cepat atau lambatnya reaksi berlangsungnya ? jelaskan berdasarkan teori tumbukan ! ( Carilah beberapa sumber : buku dan literatur dari internet )................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Laju reaksi suatu reaksi kimia dipengaruhi oleh beberapa faktor, yaitu konsentrasi pereaksi,

luas permukaan zat yang bereaksi, suhu pada saat reaksi kimia terjadi, dan ada tidaknya

katalis. Sehubungan dengan proses reaksi kimia, maka ada satu hal penting yang harus

dipelajari untuk menentukan berjalan tidaknya sebuah reaksi kimia, yakni tumbukan. Suatu

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................................................................................................................................................

...............................................3. 3. Mengapa suhu yang tinggi dapat mempercepat berlangsungnya reaksi ? jelaskan

berdasarkan teori tumbukan ! ( Carilah dibeberapa sumber : buku dan literatur dari internet )................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ ....................................................................................................................................................................................................................................................................................................................................................................... ....................................................................................................................... .......................................................................................................................

4. Mengapa dengan adanya katalis dapat mempercepat berlangsungnya reaksi ? jelaskan berdasarkan teori tumbukan !( Carilah dibeberapa sumber : buku dan literatur dari internet )........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................... ........................................................................................................................................................................................................................................................................................................................................................................

5. Apakah setiap tumbukan pasti menyebabkan berlangsungnya reaksi kimia? ( Carilah dibeberapa sumber : buku dan literatur dari internet )...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

“Kerjakan dengan sungguh-sungguh, maka ilmu kalian tidak akan sia-sia”