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# Making a Standard Solution and Titration to Find Molarity of Unknown Acid

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Introduction

ï»¿Joshua Dawber BTEC Level 3: Unit 1 Fundamentals of science Mr Nolan Making a Standard Solution and Titration to Find Molarity of Unknown Acid To find the molarity of the unknown acid, first we had to create a standard solution, the solution we created was Sodium Hydroxide (NaOH). We wanted a 0.1 molar solution of sodium hydroxide so to get this we had to dissolve 4g of NaOH into 1000cm³ of water, but we didn’t want 1000cm³ we wanted 250cm³ so to work out how much sodium hydroxide would be needed you need to do the same equation to the number of grams (g) than with the volume of water, so to get 1000cm³ down to 250cm³ you divide it by 4, so you divide 4 by 4 which gives you 1, so one gram of NaOH is needed to make a 0.1 molar solution in 250cm³ of water. Next is making the solution, the equipment needed to make this standard solution is: a balance, beaker, volumetric flask, glass rod, wash bottle. ...read more.

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Conclusion

and Cl=35. The atomic mass is the larger of the two numbers on the periodic table found with an element. The total of these atomic masses is 76. And it is exactly the same on the other side it is just that the compounds are different, this is due to the groups on the periodic table that they are in and that determines the bonds between atoms. The equation to work out the concentration of the unknown acid is: moles x 1000 ÷ average titration. The average titration is all the titration results added together and divided by 4, but we are going to discard the 23.1ml result because it isn’t close enough to the other three so is recognised as an anomaly, so (22.6 + 22.7 +22.8)÷3 = 22.7cm³ so now using the equation you can work out the concentration of the acid. (0.0248 x 1000)÷ 22.7 = 0.1093, the actual concentration of the acid was 0.0984. My predicted concentration is 0.0109 above the actual concentration this could be due to inaccuracies with the measuring of the mass of NaOH to begin with also wrongly measuring the amount of my standard solution was used to titrate the acid. ...read more.

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