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If we mass 5.36 g of KCl and dissolve this solid in 56 mL of water, what is the molality of the solution? Potassium maintains intracellular tonicity, is required for nerve conduction, cardiac, skeletal and smooth muscle contraction, production of energy, the synthesis of nucleic acids, maintenance of blood pressure and normal renal function. The density of the solution is 1.127 g/mL. The molar mass of KCl is 74.55 g/mol. 1. (The molar mass of NaOCl = 74.44 g/mol and the molar mass of H 2 O is 18.02 g/mol.) Use uppercase for the first character in the element and lowercase for the second character. It will calculate the total mass along with the elemental composition and mass of each element in the compound. If 8.45 g KCl are dissolved in 0.750 L of solution, what is the molarity of the solution? What could be the purpose of such a question in a test? Remember that molality is moles of solute/kg per solvent. For example for KCl, (1 atom X 39.0983 Potassium) + (1 atom X 35.453 Chlorine) = (74.5513 g/mol) which is the molar mass for KCl. Multiply the number of atoms for each chemical multiplied by the atomic mass. What is the mole fraction of the NaOCl in a 6.75 m solution of NaOCl in water? Now, 1 liter has 1000 ml in it. Do a quick conversion: 1 moles KCl = 74.5513 gram using the molecular weight calculator and the molar mass of KCl. Does the instructor want to figure out if you can add? (The molar mass of KCl = 74.55 g/mol and the molar mass of H 2 O is 18.02 g/mol.) Just simple math here. Calculating Molality Given Mass. Potassium chloride (also known as Sylvite, KCl, or potassium salt) is a metal halide salt composed of potassium and chlorine.It is odorless and has a white or colorless vitreous crystal appearance. Molar mass calculator computes molar mass, molecular weight and elemental composition of any given compound. Therefore, a 3 molar solution would contain 74.5 x 3 = 223.5g KCl per liter. The molar mass of KCl is 74.5 (39+35.5). We will first need to calculate the amount of moles present in 5.36 g of KCl: Add up the results from multiplying the numbers to obtain the molar mass for the compound. You already have two good answers, so the only possibly useful comments I could add are given below. Calculate the molality of 2.0 M MgCl 2 solution. The solid dissolves readily in water, and its solutions have a salt-like taste.Potassium chloride can be obtained from ancient dried lake deposits. The molar mass of KCl can be calculated by taking the sum of the individual molar masses of potassium and chlorine atoms. We need to prepare a 3M solution in 500 ml. Massa molar of KCl Massa Molar, Peso Molecular e Calculadora da Composição Elementar Potassium Chloride is a metal halide composed of potassium and chloride. Preparation of KCl solution. Check the chart for more details. 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