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# Lab Report - What volume of concentrated 12N HCl is required to prepare 250 cm3 of 5N HCl solution?

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Introduction

Chemistry What volume of concentrated 12N HCl is required to prepare 250 cm3 of 5N HCl solution? Lab Report Experimental Design Aspect 1 Variables Responding Variables - 1. Normality of HCl solution - 12N Controlled Variables - 1. Volume of 5N HCl solution to be prepared - 250 cm3 2. Volume of 12N solution required - 104.16 cm3 Aspect 2 Hypothesis M1*V1 = M2*V2 So, V1 = (M2*V2) / M1 V1 = (5 * 250) / 12 Thus, V1 = 104.16 cm3 Therefore, 104.16 cm3 of 12N HCl is required to prepare 250 cm3 of 5N HCl solution. Aspect 3 Controlling Variables 1. Use a parallax card while measuring the amount of concentrated HCl in order to avoid any sort of error. ...read more.

Middle

Accurately measure out 104.2cm3 of 12N concentrated HCl in a measuring cylinder. 2. Take approximately around 100-120 cm3 of distilled water in the 500 cc beaker and add 104.2 cm3 of Concentrated 12N HCl carefully. Glass rod must be used for stirring. Gloves must be used along with safety goggles as a step of precaution. 3. Cool the beaker when it gets hot under the tap water from time to time and transfer the solution to the 250 cm3 measuring flask. 4. Add the remaining amount of distilled water using the wash bottle to get accurate results. 5. When the water level of the measuring flask reaches the 250 cm3 mark, shake the solution well so that the solution becomes uniform. ...read more.

Conclusion

5N HCl solution to be prepared 250 Conclusion and Evaluation Aspect 1 Conclusion Therefore, in order to prepare 5N HCl we require 104.16 cm3 of 12N HCl. Aspect 2 Evaluating Procedures * Percentage errors- Percentage error= Uncertainty*100/True Value * Volume of 12N concentrated HCl solution = 00.05 * 100 (Measuring flask) 104.5 = 0.049% * Volume of 5N HCl solution made = 00.05 * 100 (Measuring flask) 250 = 0.02% ? Total uncertainty = 0.069% Aspect 3 Improving the Investigation * All the utensils should be washed properly to remove the uncertainty. * Every time use a fresh sample of the chemicals. * Use tested equipments with the least amount of uncertainty. * Make sure you do the experiment carefully to avoid the manual errors. ...read more.

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