The purposes  of study  were developing  blog  for acid  and  base  theories  and determining the  level of students' interest and satisfaction using blog. Blog is a platform of knowledge where  learners post questions, thoughts and reflections to each others. Blog which was developed from  GoogleBlogspot.com, consisted of seven parts;  Leaming  Outcome,  Lecture  Notes,  Tutorial,   Simulations,  Chemistry Community, Online Games and Hit News. The instrument for determining  interest and satisfaction level in using blog was a Li.kert-type questionnaire. The sample of the  study was 86 of first year students in Universiti Pendidikan Sultan Idris (UPSI) who took Chemistry  I (SKU 3013). The data was collected at the end of the semester 1 session 2010/2011. The  frequencies and percentage as well as mean score were analysed to answer the research questions.  The findings showed that mean score for interest and satisfaction levels were 31.83 and 33.36  r.....

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