Bachelor of Medical science (3673)

Fatty acids play an important role in brain development. Dietary fats are part of our everyday diet. They belong to a larger group of compounds called lipids. Lipids help build our cell membranes and are vital to our central nervous system –making up about 50-60% of the weight of our brain! 4 Of these brain lipids, approximately 35% are made up of polyunsaturated fatty acids (PUFAs). PUFAs are important to brain development and functioning. Essential fatty acids (EFAs) are PUFAs that cannot be made by your body and must be provided by food or supplements. Lower ranges of these EFAs are linked to impairment in cognitive function.                                                          Simplify the following text.

The concentration of a solution of NaOH of unknown concentration was determined in the following titration: 25.00-mL aliquots of the NaOH solution, measured by pipette, were titrated with 0.1184 M H2SO4, requiring an average titre of 15.22 mL. The acid, H2SO4, in solution reacted with the dissolved base, NaOH, in a stoichiometric mole ratio of 1 mol H2SO4 : 2 mol NaOH Calculate the concentration of the NaOH solution in mol/L (Input your answer to at least 4 significant figures)

The concentration of a solution of NaOH of unknown concentration was determined in the following titration: 25.00-mL aliquots of the NaOH solution, measured by pipette, were titrated with 0.1380 M H3PO4, requiring an average titre of 19.37 mL. The acid, H3PO4, in solution reacted with the dissolved base, NaOH, in a stoichiometric mole ratio of 1 mol H3PO4 : 3 mol NaOH Calculate the concentration of the NaOH solution in mol/L  (Input your answer to at least 4 significant figures)

A particular brand of 'cloudy ammonia' cleaner claims on the label 'not to contain more than 8% ammonia by volume' (that is 8% w/v). To investigate this claim, a 19.1706-ml sample of the cloudy ammonia solution - Molar mass (NH3) = 17.031 g / mol - was added to a 200.0-mL volumetric flask, and carefully made up to the mark, with thorough mixing, using distilled water. 25.00-mL aliquots of this solution were titrated with 0.3299 M HCl and an average titre of 29.34 mL of the acid was required to reach the end point. From these results, calculate the concentration of NH3 in %w/v in the cloudy ammonia solution. %w/v is calculated by determining the mass in grams of the analyte, NH3 in this case in the sample of solution (in this example 19.1706 mL). Then express this mass as a percentage of the sample volume, that is %w/v = mass of analyte / (volume of solution in mL) x 100. Express all answers to the correct number of significant figures. Enter the concentration of NH3 to the correct accuracy (number of significant figures) - the accuracy (number of significant figures) of your answer should be reported to the same accuracy (number of significant figures) as the LEAST accurate input

A particular brand of 'cloudy ammonia' cleaner claims on the label 'not to contain more than 8% ammonia by volume' (that is 8% w/v). To investigate this claim, a 19.1706-ml sample of the cloudy ammonia solution - Molar mass (NH3) = 17.031 g / mol - was added to a 200.0-mL volumetric flask, and carefully made up to the mark, with thorough mixing, using distilled water. 25.00-mL aliquots of this solution were titrated with 0.3299 M HCl and an average titre of 29.34 mL of the acid was required to reach the end point. From these results, calculate the concentration of NH3 in %w/v in the cloudy ammonia solution. %w/v is calculated by determining the mass in grams of the analyte, NH3 in this case in the sample of solution (in this example 19.1706 mL). Then express this mass as a percentage of the sample volume, that is %w/v = mass of analyte / (volume of solution in mL) x 100. Express all answers to the correct number of significant figures. Enter the concentration of NH3 to the correct accuracy (number of significant figures) - the accuracy (number of significant figures) of your answer should be reported to the same accuracy (number of significant figures) as the LEAST accurate input

A 1.1137-g sample of impure oxalic acid, H2C2O4 (Molar mass = 90.04 g / mol) is dissolved in water and an acid-base indicator added. This solution is titrated with 31.27 mL of 0.4768 M NaOH to reach the equivalent point. A molecule of oxalic acid reacts with 2 hydroxide ions. Express the concentration of oxalic acid in the sample as %w/w. The concentration term %w/w is similar to %w/v except that the concentration is calculated per mass of the sample. That means that in the final step in the calculation you divide the mass in grams of analyte by the mass in grams of the sample which was analysed x 100. Enter the concentration of oxalic acid to the correct accuracy (number of significant figures) - the accuracy (number of significant figures) of your answer should be reported to the same accuracy (number of significant figures) as the LEAST accurate input