# Solving Stoichiometry Problems

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Let's begin by calculating the concentration of a solution of glucose in water.

Say we take 2.00 g of glucose and add water until the final volume is 100 m L.

It is defined as the moles of a substance contained in one liter of solution.

For instance, if a solution has a concentration of 1.20 M Na Cl, this means that there are 1.20 moles of Na Cl per liter of solution.

Solution stochiometry problems are the same as regular stoichiometry problems except solutions are used.

Since solutions are used moles must be determined using molarity and volume. The researchers also prepared a difficulty identification index to analyse the difficulties encountered by students.Quantitative data was analysed using inferential statistics and ANCOVA.To do this, we need the molecular weight of glucose.For help calculating the molecular weight of a substance given its chemical formula, see this page. In other words, stoichiometry is the practice of using a chemical reaction equation to predict the results of the reaction. Of course, that means that we need to start with a chemical reaction.When we look at the two sides of the reaction, we have to make sure that the number of atoms of each element on each side is the same because of the principle of conservation of mass. In this section of the AP Chemistry Crash Course, we’ll start by looking at the basic concepts of stoichiometry, and then we’ll cover five applications for stoichiometry on the AP Chemistry exam.It was strongly recommended that chemistry educators should analyse and understand student difficulties if they are to assist the learners to become confident and efficient problem solvers.Furthermore chemistry educators should implement the problem-solving pedagogical technique as a means of addressing the difficulties students have in stoichiometry problem-solving. Stoichiometry allows us to work in solution by giving us the concept of solution concentration, or molarity.Molarity is a unit that is often abbreviated as capital M.