ipl-logo

Percent Composition And Empirical Formula Lab

310 Words2 Pages

Introduction : The percent composition of a compound can be found by determining the mass of each element within that compound, and with this information, the empirical formula can be determined. The lab consisted of obtaining a magnesium ribbon and having it undergo chemical reactions to create solid magnesium oxide with the aim being identifying the percent composition and empirical formula of the compound. Background Information : To determine magnesium oxide’s percent composition and empirical formula, the masses of magnesium and oxygen separately must be found and then divided by the total mass and multiplied by 100 to find the percent makeup of each element within the compound. However, to obtain magnesium oxide, it had been synthesized from magnesium and various chemical reactions with only the initial mass of magnesium and the final compound’s mass being known. …show more content…

A magnesium atom has a charge of 2+ and an oxygen atom has a charge of 2-. When the charges are balanced, the equation is MgO, one magnesium atom joined in an ionic bond with one oxygen atom. With the theoretical empirical formula found, one can now find the theoretical percent composition of MgO. The atomic molar mass of a magnesium atom is 24.31 g/mol and 16.00 g/mol for oxygen, therefore the total theoretical mass of the compound is (24.31 g/mol + 16.00 g/mol) 40.31 g/mol. The percent composition is found by dividing the element’s mass by the total mass of the

Show More
Related

Essay On Penny Lab

444 Words | 2 Pages

The purpose of the lab is to acquire the percent composition of zinc and copper. The procedure included obtaining a post 1983 penny and washing it with soap and water. Using a triangular file, we made an X on the penny. Then, we cleaned the top and bottom of the penny with steel wool until it was shiny. We rinsed the penny in acetone and dried it with paper towel.

Read More

Percent Composition Of Gum Lab Report

647 Words | 3 Pages

Purpose: The purpose of this lab is to find the percent composition of sugar in gum, and how it differs based on the brand of gum, by using the percent by mass. Hypothesis: If two separate brands of gum are masticated, in which is based on Trident and Orbit Gum, then the mass of the sugar/ the percent composition of the sugar in the gum would be the same, because the amount of sugar and sugar alcohol used in the gum are the same, based on the nutritional facts provided. Variables: Independent Variable: The Brand of Gum Dependent Variable: Percent of Composition of Sugar in Gum / Mass of Sugar (in g) Controlled Variables: The Amount Sticks of Gum, The Flavor of the Gum, Materials: ~

Read More

Explain How To Find The Percentage Composition Of Hydrates Lab Report

1573 Words | 7 Pages

Percentage Composition of Hydrates The Introduction: Hydrates are ionic compounds and are often a type of salt with a definite amount of water as part of their structure. Hydrates are decomposed into anhydrous salt, a no-water compound, and water vapor when heat is applied; water vapor is released from the hydrated compound, which leaves with an anhydrous salt that weighs less than the hydrate. But how do we find the percent of the water that was lost after applying heat to the hydrates and how accurate is finding the percent composition of water using experimentation and a gram weight scale? The purpose of the experiment is to find the percent of water lost by finding the difference between the mass of hydrate and the mass of anhydrous

Read More

Stoichiometry Lab

563 Words | 3 Pages

Stoichiometry is a method used in chemistry that involves using relationships between reactants and products in a chemical reaction, to determine a desired quantitative data. The purpose of the lab was to devise a method to determine the percent composition of NaHCO3 in an unknown mixture of compounds NaHCO3 and Na2CO. Heating the mixture of these two compounds will cause a decomposition reaction. Solid NaHCO3 chemically decomposes into gaseous carbon dioxide and water, via the following reaction: 2NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g). The decomposition reaction was performed in a crucible and heated with a Bunsen burner.

Read More

Copper Recovery Lab Report

471 Words | 2 Pages

The percent recovery of the copper was calculated using the equation, percent recovery = (the mass of the copper recovered after all the chemical reactions/the initial mass of the copper) x 100. The amount of copper that was recovered was 0.32 grams and the initial mass of the copper was 0.46 grams. Using the equation, (0.32 grams/0.46 grams) x 100 equaled 69.56%. The amount of copper recovered was slightly over two-thirds of the initial amount.

Read More

Biology Quiz

1328 Words | 6 Pages

Which of the following unit is used to indicate mass? a. Cm3 b. Um c. Mg d. mL 21. Which of the following demonstrate a chemical reaction of water?

Read More

Abundance Of Pennes Lab Report

472 Words | 2 Pages

There were 4 pre-1982 pennies and 6 post- 1982 pennies. There are three naturally occurring isotopes of Magnesium: Mg-24 (23.98 amu) found in 78.70% abundance, Mg-25 (24.99amu) found in 10.13% abundance, and Mg-26 (25.98 amu) found in 11.17% abundance. Calculate average atomic mass: The average atomic mass of Magnesium is 24.31amu.

Read More

Stoichiometry And Limiting Reagents Lab Report

1237 Words | 5 Pages

Verna Wang Hannah Palmer CHEM 101-069 Lab 11-19-16 Stoichiometry and Limiting Reagents Lab Report Purpose: We are using the reaction of sodium hydroxide and calcium chloride to illustrate stoichiometry by demonstrating proportions needed to cause a reaction to take place. Background: Just like a recipe would call for a specific amount of one ingredient to a specific amount of another, stoichiometry is the same exact method for calculating moles in a chemical reaction. Sometimes, we may not have enough of or too much of one ingredient , which would be defined as limiting and excess reagent, respectively.

Read More

Electron Configuration Of Magnesium Research Paper

206 Words | 1 Pages

For my project I choose the element magnesium. Magnesium atomic number is 12. As you know or may not know is that magnesium has 12 protons and electrons in a neutral molecule. Magnesium also has 12 neutrons. Magnesium mass number is 24.

Read More

Finding The Formula Of A Hydrate: Lab Report (CE)

1087 Words | 5 Pages

3H2O. This chemical would be called calcium sulfate trihydrate. When finding the mass of this chemical, you find the mass of the calcium sulfate and then add 3 times the mass of water to it. (40.08 + 32.066 + 4(15.999) + 3(2(1.0079) + 15.999)) = 190.19 g/mol.

Read More

Solubility Equilibrium Lab Report

1444 Words | 6 Pages

UDEC 2224 PHYSICAL CHEMISTRY II NAME YONG ZHI RHEN NAME OF GROUP MEMBERS TEH HOOI SAN, TEO SEE ZHENG STUDENT ID 1307297 NO. OF EXPERIMENT EXP 3 TITLE OF EXPERIMENT Phase equibrium DATE OF EXPERIMENT 14/7/2015 PRACTICAL GROUP P2 LECTURER Dr. ONG SIEW TENG

Read More

Mass Spectrometry Report

1442 Words | 6 Pages

MM 3320 : Report Mass Spectrometry Submitted by Velu K R NA12B033 Introduction Mass Spectroscopy is an instrumental method for identifying the chemical constitution of a substance by means of the separation of gaseous ions according to their differing mass and charge. This method helps identify the amount and type of chemicals present

Read More

Acid Base Neutralization Lab Report

1001 Words | 5 Pages

Acids are proton donors in chemical reactions which increase the number of hydrogen ions in a solution while bases are proton acceptors in reactions which reduce the number of hydrogen ions in a solution. Therefore, an acidic solution has more hydrogen ions than a basic solution; and basic solution has more hydroxide ions than an acidic solution. Acid substances taste sour. They have a pH lower than 7 and turns blue litmus paper into red. Meanwhile, bases are slippery and taste bitter.

Read More

Crospovidone Analysis

1377 Words | 6 Pages

Empirical formula : C36H70MgO Molecular weight : 591.24 daltons. Description: Magnesium stearate is a very fine, light white, precipitated or milled, impalpable powder of low bulk density, having a faint odour of stearic acid and a characteristic taste. The powder is greasy to the touch and readily adheres to the skin.

Read More

Relative Atomic Mass Lab Report

380 Words | 2 Pages

Explain what is meant by relative atomic mass?- Relative atomic mass is the measure of the mass of an element which consists of the protons and neutrons; it is always the bigger number and has the symbol Ar. An obvious example of this is oxygen has the Ar of 16 yet sodium has the Ar of 23. Explain how relative formula mass is calculated using the periodic table- You need to find the relative atomic mass (M) for each atom but this can only be done when the relative atomic mass have been found, then you add all of the masses in the compound together to find the RFM. Sodium Hydroxide is the example we used within our experiment.

Read More

More about Percent Composition And Empirical Formula Lab

Open Document