MathMaster logo

MathMaster

  1. Home
  2. general
  3. a chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate the concentr
Question

A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 4.250 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 56.0 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 121.68 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits.

83

likes
415 views

Answer to a math question A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 4.250 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 56.0 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 121.68 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits.

Expert avatar
Andrea
4.5
82 Answers
1. Determine the mass of sodium thiosulfate:
\text{Mass of sodium thiosulfate} = 56.0 \, \text{g} - 4.250 \, \text{g} = 51.750 \, \text{g}

2. Convert the volume from mL to L (if needed, though not necessary here):
\text{Total volume} = 121.68 \, \text{mL}

3. Calculate the concentration using the formula:
\text{Concentration} = \frac{\text{Mass of sodium thiosulfate}}{\text{Total volume}} = \frac{51.750 \, \text{g}}{121.68 \, \text{mL}}

4. Perform the division:
\text{Concentration} = 0.42516 \, \text{g/mL}

5. Adjust the answer to the correct number of significant digits based on the initial data provided (3 significant digits for mass and volume):
\text{Concentration} = 0.426 \, \text{g/mL}

Final answer:
\text{Concentration} = 0.426 \, \text{g/mL}

Frequently asked questions (FAQs)
Find the derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 9 at x = 2.
+
How many different ways can you arrange the letters in the word "MATH"?
+
What is the sum of the measures of interior angles of an isosceles triangle with an angle of 50 degrees?
+
New questions in Mathematics
A normal random variable x has a mean of 50 and a standard deviation of 10. Would it be unusual to see the value x = 0? Explain your answer.
The time it takes for a person to travel 300 m is 15 minutes. What is their speed in meters per second?
QUESTION l. An investigation has been carried out in a region to know the perception of "citizen insecurity" of its inhabitants. 1,270 people in the region were interviewed, of which 27.1% responded that it was a "serious" problem. Knowing that this opinion was previously held by 25.3% of the population of that region, we want to know if said opinion has changed significantly for a confidence level of 97.2%. Taking this statement into account, the following is requested: a) Critical value of the contrast statistic. b) Solve the hypothesis test and indicate what conclusion we can reach. c) P-value of contrast.
STUDENTS IN A CLASS LEARN ONLY ONE FOREIGN LANGUAGE. two-sevenths of the students learn German, half of the students learn Spanish, and the remaining six students learn Italian. what is the number of students in this class? detail your reasoning carefully.
P is a polynomial defined by P(x) = 4x^3 - 11×^2 - 6x + 9. Two factors are (x - 3) and (x + 1). Rewrite the expression for P as the product of linear factors.
What payment 7 months from now would be equivalent in value to a $3,300 payment due 23 months from now? The value of money is 2.7% simple interest. Round your answer to 2 decimal places. Show all work and how you arrive at the answer..
If L (-2, -5) reflected across y = -4. What are the coordinates of L?
Determine the equations of the lines that pass through the following points P1 (2;-1) and p2 (4;-1)
7273736363-8
Two events E and F are​ ________ if the occurrence of event E in a probability experiment does not affect the probability of event F.
A National Solidarity Bond offers A 5 year bond offering a gross return of 15% Calculate the AER for this investment. (Give your answer to two decimal places, no need for the percent or € sign in your answer)
A box contains 18 blue balls and 33 white balls. What is the ratio of the blue to white balls?
A Smooth Plane is listed for $195.00. Discounts of 12% and 10% are allowed. If the customer pays cash within 30 days, an additional discount of 3% is granted. What is the cost if a carpenter takes advantage of all the discounts offered?
A buyer purchased a North Carolina home for $475,250. The seller allowed the buyer to assume his first small mortgage with a loan balance of $110,000. How much is the excise tax paid in the transaction? $951 $729.50 $950.50 $221 none of the above
The annual real property tax liability for a residential property is $4302 and has been paid by the seller in advance of closing. Using the 30-day month/260-day year method what will be the tax proration entry on the settlement statement round to the nearest dollar for a closing on Oct. 26 if the buyer owns the day of closing? a. $3525 credit to the buyer and $777 debit to the seller b. $777 debit to the buyer and $3525 debit to the seller c. $777 credit to the buyer and $777 debit to the seller d. $3525 debit to the buyer and $3525 credit to the seller *Can anyone help with this? I am studying for my real estate exam and am having trouble with some of the calculations :)
When taking a test with m closed answers, a student knows the correct answer with probability p, otherwise he chooses one of the possible answers at random. What is the probability that the student knows the correct answer given that he answered the question correctly.
-5x=115
Below are three 95% CIs (where 𝜎 was known and 𝑥̅happened to be the same); one with sample size 30, one with samplesize 40, and one with sample size 50. Which is which?(66.2, 76.2)(61.2, 81.2)(56.2, 86.2)
How do you convert a fraction to a decimal
12[4 + (8 + 7) + 5]

You might be interested in