Experiment 7 Write Up

Please help answer these error analysis questions This is determining the percentage composition of magnesium oxide

Mixtures and compounds vary in composition with the latter having a 1) compound. The components of a mixture can be separated by 2) separated by 3). ratio of masses of each of the atom in the means while components of a compound can only be method.

1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What would happen if you lit up the candle and waited for a while? Suppose the candle was placed in a large, sealed jar that allowed it to burn for several minutes before running out of oxygen. The candle and jar are balanced by an equal weight. In this situation, what would happen if you lit up the candle and waited?

part b pls!

In setting up this experiment, a student noticed that a bubble of air leaked into the graduated cylinder when it was inverted in the water bath. What effect would this have on the measured volume of hydrogen gas? Would the calculated molar volume of hydrogen gas be too high or too low as a result of this error? Explain. 2. A student noticed that the magnesium ribbon appeared to be oxidized—the metal surface was black and dull rather than silver and shiny. What effect would the oxidized magnesium ribbon have on the measured volume of hydrogen gas? Would the calculated molar volume of hydrogen be too high or too low as a result of this error? Explain.c

EXPERIMENT : GRAVIMETRIC ANALYSIS OF PHOSPHORUS IN PLANT FOOD Aim: To determine the amount of phosphorus in a commercial plant food   I want the Calculations for this experiment

In compounding a prescription, a pharmacist weighed 0.05 g of a substance on a balance insensitive to quantities smaller than 0.004 g. What was the maximum potential error in terms of percentage?

Tell whether each of the following errors will cause the experimental mass percent of the sodium bicarbonate to be higher than, lower than, or the same as the true value. Explain your answer. The crucible was not heated long enough prior to adding mixture. Some of the carbonate spattered out from the crucible during heating The sample was not heated to constant mass. The mass of mixture used is greater than the recommended mass.

Kindly refer to the attached picture.

If the crucible originally weighs 3.715 g and 2.000 g of hydrate are added to it, what is the weight of the water that is lost if the final weight of the crucible and anhydrous salt is 5.384? Do not include units and assume three decimal places for all numbers. Remember to include the zero before the decimal if the number is less than one.

The calcium and magnesium in a urine sample were precipitated as oxalates. A mixed precipitate of calcium oxalate and magnesium oxalate resulted and was analyzed by a thermogravimetric procedure. The precipitate mixture was heated to form calcium carbonate and magnesium oxide. This second mixture weighed 0.2504 g. After ignition to form calcium oxide and magnesium oxide, the resulting solid weighed 0.1563 g. What was the mass % of Ca in the mixed oxalate precipitate?

The calcium and magnesium in a urine sample were precipitated as oxalates. A mixed precipitate of calcium oxalate and magnesium oxalate resulted and was analyzed by a thermogravimetric procedure. The precipitate mixture was heated to form calcium carbonate and magnesium oxide. This second mixture weighed 0.2504 g. After ignition to form calcium oxide and magnesium oxide, the resulting solid weighed 0.1563 g. What was the mass % of Ca in the mixed oxalate precipitate? (Derive 2 equations from the given)

1. Plop, plop. Fizz, fizz. Alka-Seltzer¹ contains sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). When it is dropped in water, it generates sodium citrate (Na3C6H5O7), releases water (H₂O), and carbon dioxide (CO₂), which is responsible for the fizzing. Balance the chemical reaction.

Balance the following chemical reaction. Enter the sum of the balanced coefficients as your answer. Assign "blank" coefficients a value of 1. ammonia + oxygen gas -→ nitrogen monoride + water

need help with this question

Only question 1 , it has 4 parts to it . NOT GRADED

Please answer parts d) and e). I already have the answers for parts a) to c). Thank you!

student had access to a balance for this procedure, they would also be asked to weigh each sample to determine the percent composition of the mixture. If a student recovered 2.85 grams of iron, 1.02 grams of salt, and 2.23 grams of sand in this procedure, what is the % composition of the mixture?

What minimal mass of H2SO4 would u need? What mass of H2 gas would be produced by the complete reaction of the aluminum block? Both in grams?

Assume that your empty crucible weighs 15.98 g, and the crucible plus the sodium bicarbonate sample weighs 18.56 g. After the first heating, your crucible and contents weighs 17.51 g. After the second heating, your crucible and contents weighs 17.50 g. Answer the following questions based on this information.

In the chemical equation, SiO2  +  C  →  SiC2  +  CO, what is the coefficient in front of SiC2?

Converting Concentrations to Different Units   Introduction:   Depending on how the concentration unit is defined, concentration can serve as a conversion between the amount of a solute and the amount of a solution or solvent. Concentrations can therefore be helpful in a number of stoichiometry issues. The original definition of the concentration unit is frequently preferred because it contains the conversion factor.  Today, for chemists, it is suitable to make a solution in the lab using a specific concentration unit like molarity, and then convert the concentration to another unit. Today in the lab, I will prepare a sodium bicarbonate (baking soda) solution with a specific molarity. I will then translate the concentration into molality, mass percent, and mole fraction.   Procedure   The first step of this lab was to make sure I had everything I needed and that my surroundings were safe. I then looked at an empty beaker weighing paper and a balance. I first took a piece of weighing…

Converting Concentrations to Different Units   Introduction:   Depending on how the concentration unit is defined, concentration can serve as a conversion between the amount of a solute and the amount of a solution or solvent. Concentrations can therefore be helpful in a number of stoichiometry issues. The original definition of the concentration unit is frequently preferred because it contains the conversion factor.  Today, for chemists, it is suitable to make a solution in the lab using a specific concentration unit like molarity, and then convert the concentration to another unit. Today in the lab, I will prepare a sodium bicarbonate (baking soda) solution with a specific molarity. I will then translate the concentration into molality, mass percent, and mole fraction.   Procedure   The first step of this lab was to make sure I had everything I needed and that my surroundings were safe. I then looked at an empty beaker weighing paper and a balance. I first took a piece of weighing…

Date Hour Name were measured before the experiment began and the data is shown below. The iron was left to react with the oxygen in a glass beaker. The mass of the iron and beaker 2. A student performed an experiment to determine how much rust (Fe,0,) could be produces experimentally if a certain mass of iron was allowed to completely react with excess Oxygen. Quantity Measured Beaker Mass a. Balance the chemical equation 20.32 g 25.09 g Fe +_02→ Fe,0, Fe,O3 Beaker and Fe Mass of Fe b. Calculate the amount of Fe,O, that should be produced if all of the Iron reacts. At the end of the experiment the student found the mass of the beaker and the Fe,Oz and added the following column to his data table. Quantity Measured Beaker and Fe2O3 Mass c. What is the experimental mass of Fe,O3? 27.18 g d. Calculate the Percent Yield of Fe203 and show your work below. V1

Suppose a student repeats Experiment I using an unknown metal instead of magnesium. The unknown metal reacts similarly to magnesium. The student adds 6.60 g of the unknown metal to a crucible that has a mass of 35.00 g. The crucible and its contents are heated over a Bunsen burner for several minutes. The mass of the crucible and its contents after heating is 43.26 g. Identify the unknown metal based on the results of the experiment. Assume all of the unknown metal reacts. Ozn O Ca Ni St Cu Write the balanced chemical equation for this reaction. Include physical states. balanced equation: