"Finding the relative atomic mass of lithium."

Determination of the proportional atomic collective of atomic fig 3 Introduction: For this probe I pass on determine the Relative atomic kettle of fish (Ar) by victimization two incompatible systems. In the first method acting I bequeath crack a percentage of atomic get 3 of a known peck in water, I bequeath thence collect the enthalpy mishandle produced, which kindle be utilise to estimate the telling atomic bundle of atomic number 3. In the mho method I will titrate the resulting resolvent of lithium hydroxide with a known concentration of hydrochloric acid, this squirt as well be used to compute the relative atomic mass of lithium. Readings: *century cm3 of water *37.47 g of lithium positive(p) the watch ice *37.41 g of maintain glass *122 cm3 of hydrogen ordnance collected Calculations from method 1 Moles of hydrogen produced: Assuming that 1 groine of grease-gun occupies 24000 cm3 at pressure and style temperature! I will now calculate the number of moles of the hydrogen gas produced. I will do that by dividing the volume of gas produced by 24000cm3 : Moles (n) = Volume (cm) 24000 cm So: n = 122 cm = 0.005083 mol of H2 24000 cm Equation: 2 Li(s) + 2 H2O (L)2LiOH(Ag) + H2 (g) By looking at at the Stoichiometry ratio in the reaction I can see that the ratio of Li: H2 is 2:1, therefore the number of moles of Li will be double as the number of moles of H2 in the reaction. So: 0.005083 x 2= 0.

010166 mol of Li Mass of Lithium = Mass of the Lithium plus the watch glass - the mass of the watch glass So: 37.47g - 37.41g = 0.06g ·0.06g of lithium was used Relative atomic mass of lithium: I will now calculate the relative atomic mass of the piece of lithium that I used by rearranging a formula. This shove is foreign to me, moreover I can secernate that the talking to you use is precise simple and easy to understand. The calculations luck is where I lose it. Sorry, probably not much servicing to you. If you insufficiency to get a full essay, order it on our website: Ordercustompaper.com

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