Why does sugar waters boiling point increase?
Pure substances have fixed melting and boiling points. Change in their purity can lead to change in both of Melting and boiling points. Pure water has boiling point 100 degrees centigrade. When we add salt or sugar it became impure or became a solution of salt or sugar. The resulting solution will boil at higher temperature (>100 degree C) than that of pure water. This is known as colligative properties of solutions. The colligative properties are Elevation in Boiling point and depression in freezing point. If the above solution is kept for solidification then it will solidify below 0 degrees centigrade. As melting point of ice is 0 degrees, the presence of impurity decreases it to below 0 degrees. For example, the goldsmith melts gold at much lower temperature than its melting point by adding some impurity to pure gold and then shape it as required.
