How Do You Calculate Molarity (M)?
Molarity (M) is an important concept in biology and chemistry. Many biology and chemistry classes explain this concept more than once to illustrate its importance to students. Molarity is denoted by the capital M. This article explains what molarity is and how to calculate it step by step. Molarity is a very common unit used in chemistry and biology to define concentration of solutions. Molarity has the units of moles / Liter, but is denoted by the capital M instead of writing out moles / Liter. Here is an example on how to calculate molarity. When you dissolve 5 grams of NaCl in 500 mL of water, what is the molarity of the final solution? This can be calculated by finding the moles of the NaCl (solute) first. To get the moles, you have to know the molecular weight of NaCl. This is found on the periodic table; look at Na and Cl separately. You should get 23 grams / mole for Na and 35.4 grams / mole for Cl. Add the two up; you should get 58.4 grams / mole for NaCl. Divide the 5 grams by
