A 17.0-g sample of hf is dissolved in water to give 2.0 x 10 2 ml of solution. the concentration of the solution is:

2 answers:

8 0

The solution's concentration is 4.25 M

Explanation

molarity=moles/volume in liters

moles = mass/molar mass
the molar mass of HF is calculated as 19 + 1 = 20 g/mol
hence, moles = 17.0 g / 20 g/mol = 0.85 moles

volume in liters = 2 x10^2ml/1000 = 0.2 liters

thus, molarity = 0.85/0.2 = 4.25 M

lorasvet [2.7K]1 month ago

4 0

The concentration of the HF solution is 4.25 M. Molarity, represented as M, indicates the molar concentration of a solution, calculated by the amount of solute in moles divided by the total volume of the solution in liters. The molarity is defined by the formula: Given that the total volume of the solution is V = 2 × 10² mL = 0.2 L (since 1 mL = 10⁻³ L) and that the mass of solute (HF) is w = 17 g, with the molar mass being m = 20 g/mol, we want to find the Molarity of the HF solution. Consequently, we can compute the moles of solute (HF) and ultimately determine the molarity, which is found to be 4.25 M.

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