The Study of Students' Conceptual and Algorithmic Understanding on Buffer Solution

The aims of this study were: 1) describing students' conceptual and algorithmic understanding on the buffer solution, 2) finding the correlation between students' conceptual and algorithmic understanding of the buffer solution. The design of this study used a descriptive research design. The research participants were 11th grade students of public high school in Ponorogo Indonesia. The research instrument was a multiple choice question with open ended reason consisting of 10 conceptual and 10 algorithmic questions. The research instrument has a content validity of 86.4% and a reliability coefficient of 0.684 (high category). The research data were analyzed by calculating the percentage of students' conceptual and algorithmic understanding, and continued with correlation analysis between students' conceptual and algorithmic understanding. The results showed that the students' conceptual understanding on the buffer solution was very low (18%), the students' algorithmic understanding on the buffer solution was low (25%), and there was a significant correlation between students' conceptual and algorithmic understanding on buffer solution with a correlation coefficient of 0.433. Teachers should facilitate students' conceptual dan algorithmic understanding proportionally