I am required to obtain an accurate value of molarity (concentraton) of a given solution of Sodium Hydroxide. The Standardisation is carrid out by titration against a known and accurate weight of the primary standard KHP (Given Mr: 204.22)
Mass of KHP/g = 0.6002 NaOH titre value 1/ml = 29.85 ml
What s the Molarity of the NaOH solution?
Any help provided will be appreciated.
I keep getting 0.0008773 moldm-3... Says I'm wrong.Oddly I find these type of equations extremely simple, but for some reason I can't get this I feel like I'm making a stupid mistake somewhere...
I am required to obtain an accurate value of molarity (concentraton) of a given solution of Sodium Hydroxide. The Standardisation is carrid out by titration against a known and accurate weight of the primary standard KHP (Given Mr: 204.22)
Mass of KHP/g = 0.6002 NaOH titre value 1/ml = 29.85 ml
What s the Molarity of the NaOH solution?
Any help provided will be appreciated.
I keep getting 0.0008773 moldm-3... Says I'm wrong.Oddly I find these type of equations extremely simple, but for some reason I can't get this I feel like I'm making a stupid mistake somewhere...
did you write a balanced equation? did you use mol=mass/mr and n=v*c? did you convert your units correctly?
so using c=1000n/v i got 1000*2.9x10^-3/29.85= 0.098 molarity
Also could I ask you another question if you don't mind? It's the same thing but for titre 2. This time the grams are 0.6066. KHP (Given Mr: 204.22)
Mass of KHP/g = 0.6066 NaOH titre value 1/ml = 29.85 ml
What I'm getting is this:
Moles = 0.6066/204.22 = 0.00297033
Concentration = 0.00297033/0.02985 = 0.09950841 to 4 d.p = 0.0995
Am I wrong? The system is making me final lose marks because of it. Last error was due to a simple calculator mistake, but this time I'M SURE it's correct!
Also could I ask you another question if you don't mind? It's the same thing but for titre 2. This time the grams are 0.6066. KHP (Given Mr: 204.22)
Mass of KHP/g = 0.6066 NaOH titre value 1/ml = 29.85 ml
What I'm getting is this:
Moles = 0.6066/204.22 = 0.00297033
Concentration = 0.00297033/0.02985 = 0.09950841 to 4 d.p = 0.0995
Am I wrong? The system is making me final lose marks because of it. Last error was due to a simple calculator mistake, but this time I'M SURE it's correct!
yes that's exactly what i got too following your calculations. Only thing i see you lose marks for is no units on the concerntration but that's a small thing possibly another balanced equation? but i doubt they'll penalise you for not writing out the equation again
yes that's exactly what i got too following your calculations. Only thing i see you lose marks for is no units on the concerntration but that's a small thing possibly another balanced equation? but i doubt they'll penalise you for not writing out the equation again
Thank You for your help! It was apparently a system error!