Adding or A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. 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: 8.00 g . She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 61.4 g. . She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 156.2 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. g mL -1 0.0 X S 2 db
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![**Title: Calculating the Concentration of a Potassium Chloride Solution**
A chemistry student must record in her lab notebook the concentration of a potassium chloride solution. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution.
**Procedure:**
1. **Preparation:**
- The label on the graduated cylinder reads:
**Empty weight:** 8.00 g
2. **Measuring Mass:**
- Solid potassium chloride was added to the graduated cylinder, and the total weight was measured:
**Weight with potassium chloride:** 61.4 g
3. **Calculating Mass of Potassium Chloride:**
- Mass of potassium chloride = 61.4 g - 8.00 g = 53.4 g
4. **Dissolving and Measuring Volume:**
- Water was added to the graduated cylinder to dissolve the potassium chloride completely. The total volume of the solution was read from the cylinder markings:
**Total volume:** 156.2 mL
**Problem:**
Calculate the concentration that the student should record in her lab notebook. Ensure the answer has the correct number of significant digits.
**Concentration Calculation:**
\[
\text{Concentration} = \frac{\text{Mass of potassium chloride (g)}}{\text{Total volume of solution (mL)}} = \frac{53.4 \, \text{g}}{156.2 \, \text{mL}}
\]
*The interface on the screen seems to include a placeholder for entering the calculated concentration in grams per milliliter \(\text{g} \cdot \text{mL}^{-1}\).*
Additionally, graphical buttons appear for performing arithmetic operations or potentially adjusting the value entry.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F119fd9ee-0d86-405f-8fbb-1cd17cdf6dea%2F4de52251-fb3b-47c7-a805-94df1a7b291f%2Fra3nah4_processed.jpeg&w=3840&q=75)

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