Abstract. In today's era of developing science and technology, education in the system too There are a number of changes. Chemistry is considered a bit more complicated than other sciences, because in order to study this science in depth, both theoretical and mental imagination are required. In chemistry lessons, along with studying theoretical materials, problems that are calculated in various ways are always solved in parallel. This article provides information about the basic concepts of chemistry, such as molar concentration and normal concentrations, and methods for solving various problems related to solutions