ABSTRAKPenelitian ini dilatarbelakangi dengan rendahnya hasil belajar kimia siswa kelas XI pada materi hidrolisis garam. Untuk itu, dilaksanakan penelitian eksperimen dengan rancangan pretest dan postest untuk mengetahui pengaruh penerapan model Problem Based Learning terhadap hasil belajar siswa kelas XI SMA Negeri 4 Pekanbaru pada materi hidrolisis garam. Subjek penelitian ini adalah siswa kelas XI IPA tahun ajaran 2014/2015 dengan jumlah sampel 2 kelas yaitu XI IPA 1 (eksperimen) dan XI IPA 4 (kontrol). Data penelitian dikumpulkan melalui observasi, tes data awal yaitu tes homogenitas dan tes data akhir yaitu pretest dan postest, serta dokumentasi. Untuk mengetahui pengaruh penerapan model terhadap hasil belajar digunakan rumus Kp. Perbedaan pengaruh dianalisis dengan t-test sampel related. Hasil analisis data awal dan data akhir diperoleh nilai thitung = 2,55 dan ttabel = 2,00 pada taraf signifikan 5%. Nilai thitung> ttabel,sehingga Ho ditolak, dan Ha diterima yang berarti menunjukkan adanya pengaruh penerapan model Problem Based Learning terhadap hasil belajar siswa kelas XI SMA Negeri 4 Pekanbaru pada materi hidrolisis garam, dengan pengaruh sebesar 9,35%.Kata kunci: Hasil Belajar, Problem Based Learning, Hidrolisis garam. ABSTRACTThis research was motivated by the low of chemistry learning outcomes of students eleventh grade on salt hydrolysis topics. It was an out experimental research with pretest and post-test to identify the effect of the application problem based learning model on student learning outcomes of students at class XI SMAN 4 Pekanbaru on salt hydrolysis topics. The subjects of this research were students of class XI IPA 2014/2015 academic year with sample consists of two classes, they were: XI IPA 1 (experimental) and XI IPA 4 (control). The data were collected through observation, test, and documentation. To determine the effect of application model on the students learning outcomes used formula Kp. The different of influence were analyzed by sample related t-test. The result of analyzed first and last data was tcount = 2.55 and ttable = 2.00 in 5% significance level, Howas rejected, and Hawasreceived. Because the tcount> ttable which means indicates that there was an effect of application problem based learning model on students learning outcomes of class XI SMAN 4 Pekanbaru in the topic of salt hydrolysis which influence was 9.35%.

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