Magnesite, commonly referred to as magnesium carbonate, is a commonly found mineral in carbonate reservoirs where hydrocarbons are found. The role of magnesite dissolution is important to explore because it can dramatically affect reservoir properties that are directly involved with secondary recovery processes such as matrix acidizing. The goal is to investigate how magnesite dissolution is affected by different distributions of magnesite and different velocities of inlet solution in order to make acidizing more effective in the field. Similar studies have been published on this topic with other carbonate minerals such as calcite and dolomite.