What is the molarity of a solution made by dissolving 20.0 g of H3PO4 is 50.0 ml of solution?


2 Answers

Abi Ainscough Profile
Abi Ainscough answered
The complete molarity of solution made by dissolving 20.0 g of H3PO4 in 50.0 ml of solution is 4.08 moles (M). This calculation of molarity is ascertained by performing an equation, where 1000 is divided by 50, and then multiplied by the sum of 3, plus 30, plus 64 (divided by twenty). When this equation is properly calculated, the end result will always be 4.08 M.

  • Understanding molarity

Molarity can be explained as a technique for calculating concentration in a solution. A formula, or equation, is used to calculate the mole per unit of solute in a solution, in order to deduce the correct concentration level for a particular fluid or gel.

  • Molarity may be used to perform science experiments

Once this information is at hand, concentration levels can be studied, and the properties of a solution can be more fully understood. Scientists and chemists may study molarity during experiments, and use the calculation of molarity to draw conclusions and test their hypotheses.

  • Molarity is part of the study of chemistry

Students may learn about molarity while studying chemistry in high school, college, or university. In general, calculating molarity accurately will require some intermediate knowledge of mathematics; however, a molarity equation may be done on a calculator or a computer program, such as Excel (which allows the user to punch in a formula within a specific cell, or group of cells).

People who need information about molarity include chemists, teachers, professors, students, and people who work with fluids and gels - examples of industries that feature concentrations of active ingredients in their products include the beauty/cosmetics industry, or pharmaceuticals.

It's important to understand molarity when selling products to the public which may impact their health, safety or appearance - therefore, the calculation of molarity is a vital part of understanding the chemical composition of ingredients within a solution.
John McCann Profile
John McCann answered

Molarity = moles of solute/Liters of solution

Need moles phosphoric acid.

20.0 grams H3PO4 (1 mole H3PO4/97.994 g) = 0.204 moles H3PO4

50.0 mL = 0.05 Liters


Molarity = 0.204 moles H3PO4/0.05 Liters

= 4.08 M H3PO4

======Same answer, different approach.

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