﻿ find the percent composition of caco3 in a marble sample yahoo ansers [email protected] | +86-21-58386256

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1/7/2008· Hi As part of working out the mass of CaCo3 contained in a known mass of eggshell, I need to understand why this relationship applies: moles CaCO3 = moles HCl reacted x (1 mol CaCO3 / 2 mol HCl ) using the reaction CaCO3 + 2HCL => CaCl2 + CO2 + H2O

Get Price ### What is the percentage of composition of na2co3 - Answers

Here we have 2 atoms of Na, 1 of C, and 3 of O, which is why we multiply the atomic weights by those numbers. Na = 22.989770 * 2 = 45.97954 g/mol C = 12.0107 * 1 = 12.0107 g ...

Get Price ### 3198.6 mg CaCO3 in antacid? | Yahoo Answers

5/9/2008· Then I had to calculate moles base in sample (3 trials averaged 0.00420), moles base in tablet (average of 0.0164), mg CaCO3 in sample (820.738), and mg CaCO3 in tablet. The average mg CaCO3 in tablet from the 3 trials I calculated to be 3198.6, but that

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26/10/2011· Student neutralised 2.68g of CaCO3 with 2.5 mol dm-3 Nitric acid Equation of reaction: CaCO3 (s) + 2HNO3 (aq) ¬¬> Ca(No3)2(aq) + CO2(g) + H2O(l) student left solution of Calcium Nitrate formed to crystalise. crystals of Calcium Nitrate formed containing 30.50 % of H2O by mass. Calculate the formula of hydrated calcium nitrate Sorry...Is it just me of is something wrong with the grammer ...

Get Price ### Calcium carbonate | CaCO3 - PubChem

Calcium Carbonate is the carbonic salt of calcium (CaCO3). Calcium carbonate is used therapeutically as a phosphate buffer in hemodialysis, as an antacid in gastric hyperacidity for temporary relief of indigestion and heartburn, and as a calcium supplement for preventing and treating osteoporosis.

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19/2/2008· Now you want to find the percentage of calcium, so get the mass from above and divide it by the whole molar mass. 40.08g/mol divided by 100.09g/mol (times this by 100 to get a percent). Your answer would be 40.04%.

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40.04 % You take the atomic mass of calcium over the atomic mass of CaCO_3 and multiply it by 100 to get the percentage. The mass of Ca is 40.078 g; the mass of C is 12.01 g, and the mass of 3O is 47.997 g ("15.999 g" xx 3). Add all the masses together to

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The percent of silicium dioxide in the mixture is 26,85 %.

Get Price ### Calculating the CaCO3 in eggshell? | Yahoo Answers

1/7/2008· Hi As part of working out the mass of CaCo3 contained in a known mass of eggshell, I need to understand why this relationship applies: moles CaCO3 = moles HCl reacted x (1 mol CaCO3 / 2 mol HCl ) using the reaction CaCO3 + 2HCL => CaCl2 + CO2 + H2O

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This is a classic chem lab! It involves massing a compound, then heating it to remove water and then measuring its mass a second time. This can be approached in two different ways, calculating the percent of water in a hydrate from experimental data or analysis of a chemical formula. Let's discuss experimental analysis first. Let's say that you are given a hydrated salt we'll call Y. Its ...

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22/9/2015· Objective: find the molar mass of the metal in an unknown soluble metal carbonate, M2CO2(is the M the unknown metal?), which involves the precipitation of all the CO3^2 ion as calcium carbonate, CaCO3, from a solution of an unknown metal carbonate. The following masses were obtained: - mass of weighing vial + M2CO3 = 6.7335g - Mass of weighing vial = 5.2332g - Mass of M2CO3 = …

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26/9/2007· For the best answers, search on this site https://shorturl.im/axFE9 In order to solve this we need an equation - although it doesn't matter what the acid is, let's use HCl. CaCO3 + HCl ---> CO2 + CaCL2 + H20 note that there is a 1 to 1 molar ratio of CO2 to CaCO3 - that is each mole of CaCO3 reacted produces 1 mole of CO2.

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\$ce{CaCO3}\$ is basic so it will neutralize the acid. \$\$ce{CaCO3 + 2HCl -> CaCl2 + H2O +CO2}\$\$ In your experiment you need to devise a way of finding out what the end point of the reaction is (using a \$mat{pH}\$ indicator to find when the mixture is neutral).

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\$ce{CaCO3}\$ is basic so it will neutralize the acid. \$\$ce{CaCO3 + 2HCl -> CaCl2 + H2O +CO2}\$\$ In your experiment you need to devise a way of finding out what the end point of the reaction is (using a \$mat{pH}\$ indicator to find when the mixture is neutral).

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›› Percent composition by element Element Symbol Atomic Mass # of Atoms Mass Percent Calcium Ca 40.078 1 40.043% Carbon C 12.0107 1 12.000% Oxygen O 15.9994 3 47.957% ›› Similar chemical formulas Note that all formulas are case-sensitive CaCo3 ...

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overall group result that demonstrates the concept of percent composition. A group graph is produced. This graph is used by each pair of students in Part 2 in order to determine the percent composition of a Tums® tablet. A second, more traditional

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26/5/2010· Calculating CaCo3 + 2HCl → CaCl2 + CO2 + H2O? Using the balanced equation for this reaction, calculate the theoretical volume in mL of CO2 that should be produced by the reaction of your starting mass of CaCO3 with excess HCL STP. (1 mol of gas at STP

Get Price ### Gravimetric Analysis of a Soluble Carbonate? | Yahoo …

22/9/2015· Objective: find the molar mass of the metal in an unknown soluble metal carbonate, M2CO2(is the M the unknown metal?), which involves the precipitation of all the CO3^2 ion as calcium carbonate, CaCO3, from a solution of an unknown metal carbonate. The following masses were obtained: - mass of weighing vial + M2CO3 = 6.7335g - Mass of weighing vial = 5.2332g - Mass of M2CO3 = …

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Get Price ### Calculate CaCo3 + 2HCl → CaCl2 + CO2 + H2O? | Yahoo …

26/5/2010· Calculating CaCo3 + 2HCl → CaCl2 + CO2 + H2O? Using the balanced equation for this reaction, calculate the theoretical volume in mL of CO2 that should be produced by the reaction of your starting mass of CaCO3 with excess HCL STP. (1 mol of gas at STP

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\$begingroup\$ That's what's annoying me, the lab is titled "to find the percent of caco3 in commercial antacid by using back titration", and our teacher told us to focus only on the CaCo3 . And everyone in my class got volumes of NaOH (to endpoint) around 40mL, so I don't think it was something wrong with my experiment \$endgroup\$ – mdan Nov 10 '13 at 16:51

Get Price ### Techniques for Determining Limestone Composition and …

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[email protected]
or call 888-707-5814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm. ET), to start a free trial, get pricing information, order a reprint, or post an ...

Get Price ### When a 1.25-gram sample of limestone was dissolved in …

When a 1.25-gram sample of limestone was dissolved in acid 0.44 gram of CO2 was generated if the rock contained no carbonate other than CaCO3 what was the percent of CaCO3 …

Get Price ### Mixture of Calcium Carbonate and Magnesium …

5/7/2010· A mixture of Calcium Carbonate and Magnesium Carbonate, with a mass of 10g, was heated to constant mass, with the final mass being 5.096g. I need to know the percentage composition of the mixture, by mass. --- Hi, I need to know the answer and working out to this question. I've spent hours trying to figure out the correct way to do it, but I can't even work out what Magnesium Carbonate ...

Get Price ### When a 1.25-gram sample of limestone was dissolved in …

When a 1.25-gram sample of limestone was dissolved in acid 0.44 gram of CO2 was generated if the rock contained no carbonate other than CaCO3 what was the percent of CaCO3 …

Get Price ### EXPERIMENT Calcium Carbonate Content of 01

Calcium Carbonate Content of Limestone Experiment ## 4 know (2x + y), and we know y, so we can calculate x from our measured quantities. Example Calculation 1.1 A 0.504 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 50.00 mL

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