I want to thank your team (Jeff) for finding a new writer when you were unable to reach my existing writer to revise my paper. I appreciate your professionalism and efforts. Thanks
Here’s one way to do it.
Concentrated hydrochloric acid is usually available at a concentration of 37.7% by mass. The of the solution is 1.19 g/mL. What is its molar concentration?
Step 1. Calculate the mass of 1 L of solution.
##”Mass of solution” = 1000 color(red)(cancel(color(black)(“mL soln”))) × “1.19 g soln”
/(1color(red)(cancel(color(black)(“mL soln”)))) = “1190 g soln”## (3 + 1 guard digit)
Step 2. Calculate the mass of ##”HCl”##.
##”Mass of HCl” = 1190 color(red)(cancel(color(black)(“g soln”))) × (37.7″g HCl”)/(100color(red)(cancel(color(black)(“g soln”)))) = “448.6 g HCl”##
Step 3. Calculate the moles of ##”HCl”##.
##448.6 color(red)(cancel(color(black)(“g HCl”))) × “1 mol HCl”/(36.46color(red)(cancel(color(black)(“g HCl”)))) = “12.30 mol HCl”##
Step 4. Calculate the of the HCl.
##”molarity” = “moles of HCl”https://studydaddy.com/”litres of solution” = “12.30 mol”https://studydaddy.com/”1 L” = “12.3 mol/L”##
Here’s a summary of the types of calculations we were using avove
And here’s a video about converting mass % to molarity.
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