<![CDATA[ Abstrack        The research background is poor conceptual comprehension on salt hydrolysis chemistry in XI grade science students of SMA Negeri 1 Sungai Kakap. The research aims to know the difference between conceptual comprehension in XI grade science students of SMA Negeri 1 Sungai Kakap in the salt hydrolysis material which was taught using conventional learning model and using guided discovery learning model and to know the influence of guided discovery learning model toward concept comprehension students. The research method was quasy exsperimental design with nonequivalent pretest posstest group control design. The essay test and interview were used as instrument. The posttest results of both class were analysis using the U-Mann Whitney test with a= 5%, and revealed value Asymp. Sig (2-tailed) 0.012 (sig <0.05). It indicated that there was the difference in conceptual comprehension between students taught by guided discovery learning model amd conventional model. The effect size give a value of 0,62 by percentage 23,24%, indicating that guided discovery learning model gave influence to the conceptual comprehension of students in XI grade science students of SMA Negeri 1 Sungai Kakap on the salt hydrolysis chemistry.  Kata kunci: Guided Discovery Learning, Pemahaman konsep, hidrolisis garam.]]>
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