Abstrak: Penelitian ini bertujuan untuk menghasilkan panduan praktikum kimia berbasis inkuiri terstruktur yang valid, praktis dan efektif di kelas XII SMAN 1 Indralaya Utara.Metode penelitian menggunakan penelitian pengembangan dengan model pengembangan Rowntree.Tahap penelitian meliputi perencanaan, pengembangan dan evaluasi.Tahap evaluasi menggunakan tahap evaluasi Tessmer yang terdiri dari expert review, one to one, small group dan field test.Hasil validasi expert review terdiri dari skor

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... idasi materi yaitu 81,3% termasuk kategori baik, skor validasi pedagogik 82,7% termasuk kategori baik dan skor validasi desain 78,67% termasuk kategori baik. Hasil skor rata-rata angket one to one dan small group adalah 83,5% dan termasuk kategori sangat praktis. Hasil field test menunjukkan 87,09% siswa mendapatkan nilai ≥70. Hal tersebut menunjukkan bahwa panduan praktikum kimia berbasis inkuiri terstruktur pada materi sifat koligatif larutan di kelas XII SMAN 1 Indralaya Utara yang telah dikembangkan memenuhi kriteria valid, praktis dan efektif. Abstract: This study aims to produce a practical guide to structured inquiry-based chemical valid, practical and effective in SMAN 1 Indralaya class XII North. Using research methods development research by Rowntree development model. Research phase includes planning, development and evaluation. Phase evaluation using Tessmer evaluation phase consisting of expert review, one to one, small group and field tests. The results of the expert review validation consists of material validation score is 81.3% categorized as good, 82.7% pedagogic validation scores categorized as good and a score of 78.67%, including design validation both categories. The results of the questionnaire an average score of one to one and small group was 83.5% and included the category of very practical. Field test results showed 87.09% of students scored ≥ 70. It shows that the chemistry lab manual is structured in inquiry-based solution colligative properties of the material in class XII North Indralaya SMAN 1 which has been developed meets the criteria of a valid, practical and effective.