The most important thing to keep in mind when it comes to diluting solutions is that the number of moles of solute must remain constant at all times. Show Simply put, the number of moles of solute present in the dilute solution must be equal to the number of moles of solute present in the concentrated sample. This is the key to any dilution calculation. As you know, molarity is defined as
In essence, when you dilute a solution, you decrease its concentration by increasing its volume, which in turn is done by adding more solvent to the solution. #color(white)(a)# #color(white)(a)# So, you know the molarity and volume of the target solution, which means that you can determine how many moles of hydrochloric acid it must contain
Now your task is to determine what volume of the concentrated solution would contain this many moles of hydrochloric acid.
Plug in your values to get
Expressed in milliliters and rounded to two sig figs, the answer will be
This is exactly what the formula for dilution calculations allows you to do
Here you have #c_1#, #V_1# - the molarity and volume of the concentrated solution Once again you will have
So, you would prepare this solution by adding enough water to your #"160-mL"# sample of #"0.25-M"# hydrochloric acid solution to make the total volume of the resulting solution equal to #"1.00 L"#.
How can we prepare 0.25 N HCl solution?Simply put. 37% SOLUTION means it is containing 37g in 1000ml which in turn means 1 Molar solution app. Hence take 25ml (0,925g) and dilute further to 1000ml to get 0.025molar solution.
How do you make a 0.5 HCl solution?To prepare 1 L of 0.5 N HCl solution, you have to take 0.5 gram equivalent of pure HCl. 1 gram equivalent of HCl = 1 mole of HCl. So, 0.5 gram equivalent HCl = 0.5 mole HCl = (0.5 x 36.5) gram HCl = 18.25 g HCl. Take 1 L volumetric flask.
How do you make a 2% HCl solution?1M HCl: add 1mol/12M = 83 ml conc. HCl to 1L of water or 8.3ml to 100ml.. 2M HCl: add 2mol/12M = 167 ml conc. HCl to 1L of water or 16.7ml to 100ml.. How do I make a 1% HCl solution?To make 1 L of 1 mol/L HCl, we take 88 mL of the concentrated solution and add water to make a total of 1 L.
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