Alternative Concepts of Chemical Reaction Rates of Grade 11 Students in Somdeth Phra Piya Maharaj Rommaniyakhet School

Abstract

The purpose of this Survey Research were 1) to construct and check the quality of the Survey Test, 2) to explore student conceptions about Rate of chemical reaction for eleven grade students, and 3) to collect wrong answers and Alternative Conceptions about Rate of chemical reaction. The participants were 48 eleven – grade students. The instruments used in this research were The survey test in form of short answer, completion, model drawing, and calculation of 39 item, was used to gather the information about student’s conceptual in three conceptions. There was Definition of Rate of chemical reaction and Calculation in Rate of chemical reaction, Conception about chemical reaction, and Factors Affecting the Rate of Reaction.

The research finding were as follows: 1) The result of checking the quality of Survey test of 39 item, It was found that the test was on the content validity with Item – Objective Congruence (IOC) in the range of 0.60 – 1.00. The result to explore showed that eleven grade students have sound understanding in Rate of chemical reaction (41.67%), alternative conceptions in Rate of chemical reaction (40.28%), partial understanding (11.11%), and no understanding (6.94%). The most topic of sound understanding were Factors Affecting the Rate of Reaction (47.92%) and the most difficulty concepts for most of the student were Definition of Rate of chemical reaction and Calculation in Rate of chemical reaction (43.75%).