I am doing a lab online and have no clue on how to get started with the following questions? Please Help me!
1. Calculate and record the following (in grams):
(a) mass of NaCl by subtraction of other components:
(b) measured mass of NaCl after boiling away water:
2. Calculate the percent difference between the results from the two methods from the following equation:
% difference = |(measured mass) - (mass by subtraction)| / (mass by subtraction) * 100%
3. Based on your experimental results, which is the preferred method of separation?
4. What is the mass percent of each component in your mixture? To determine the mass percent, divide the mass of the component by the mass of the total 10g sample and multiply that result by 100.
(a) % NH©þCl =
(b) % SiO©ü =
(c) % NaCl =
52.26g for a and 50.040 for b in question one and not sure if it's right??
With no date I don't know how we can help you.
Calculation of the sodium chloride (NaCl) content and evaporation:
1. The amount of sodium chloride in the original mixture may be determined indirectly by adding the masses of ammonium chloride and sand together and subtracting the sum from the initial sample mass of 10g.
2. Next, we will use an alternative procedure to calculate the mass of the sodium chloride. We will heat the solution, which will cause the water to evaporate and leave only the salt.
3. Begin by placing the beaker with the sodium chloride solution on the Bunsen burner, over a low flame, and bringing the solution to a boil.
4. Make sure that the Data window is still open and click on the beaker. Watch the Data window until all of the water has boiled off, leaving only the solid sodium chloride. Then remove the beaker from the flame.
5. Weigh and record the mass of the beaker with the sodium chloride.
Question #1 :
1. Calculate and record the following (in grams):
(a) mass of NaCl by subtraction of other components:
(b) measured mass of NaCl after boiling away water:
2. Calculate the percent difference between the results from the two methods from the following equation:
% difference = |(measured mass) - (mass by subtraction)| / (mass by subtraction) * 100%
3. Based on your experimental results, which is the preferred method of separation?
4. What is the mass percent of each component in your mixture? To determine the mass percent, divide the mass of the component by the mass of the total 10g sample and multiply that result by 100.
(a) % NH4Cl =
(b) % SiO2 =
(c) % NaCl =
Answer :
a) mass of NaCl by subtraction of other components: 52.26g
(b) measured mass of NaCl after boiling away water:50.040g
I don't know if this information will help? I need some guidance and don't know if it's a case of plug and chuck.
5464
To get started with the questions, let's break them down step by step:
1. (a) To calculate the mass of NaCl by subtraction of other components, you need to subtract the masses of the other components from the total mass of the mixture. The total mass of the mixture is not given, so you may need to provide this information. Let's say the total mass is 10 grams, and the masses of the other components are provided. Subtract the masses of the other components from 10 grams to get the mass of NaCl.
Example: If the mass of the other components is 7.74 grams, then the mass of NaCl would be 10 grams - 7.74 grams = 2.26 grams.
1. (b) To measure the mass of NaCl after boiling away water, you need to perform the experiment. The procedure for boiling away water and measuring the remaining mass of NaCl should be provided to you in the lab instructions. Follow those instructions and record the measured mass of NaCl.
Example: Let's say you measured the mass of NaCl after boiling away water and found it to be 8.76 grams.
2. To calculate the percent difference between the results from the two methods, use the formula:
% difference = |(measured mass) - (mass by subtraction)| / (mass by subtraction) * 100%
Substitute the values you obtained in step 1(a) and 1(b) into the formula and calculate the percent difference.
Example: % difference = |8.76 grams - 2.26 grams| / 2.26 grams * 100%
3. To determine which method of separation is preferred based on your experimental results, compare the percent difference calculated in step 2. The method with the smaller percent difference is considered more accurate.
4. To calculate the mass percent of each component in your mixture, you need to divide the mass of each component by the total mass of the 10g sample, and then multiply by 100.
Example:
(a) % NH4Cl = (mass of NH4Cl / total mass) * 100%
Let's say the mass of NH4Cl is 3.65 grams.
% NH4Cl = (3.65 grams / 10 grams) * 100%
(b) % SiO2 = (mass of SiO2 / total mass) * 100%
Let's say the mass of SiO2 is 1.25 grams.
% SiO2 = (1.25 grams / 10 grams) * 100%
(c) % NaCl = (mass of NaCl / total mass) * 100%
Using the calculated mass of NaCl from step 1(a) or the measured mass from step 1(b).
% NaCl = (2.26 grams / 10 grams) * 100%
Please note that the example values used above are for demonstration purposes. Use the actual values you obtained in your experiment to calculate accurate results.