molarity & solutions. prescription drugs in the correct concentration make you better. in higher...
TRANSCRIPT
![Page 1: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/1.jpg)
Molarity & Solutions
![Page 2: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/2.jpg)
Prescription drugs in the correct concentration make you better.In higher concentration they can kill you.
![Page 3: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/3.jpg)
Chemists need to make solutions that have precise concentrations
![Page 4: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/4.jpg)
Pesticides must be in proper concentrations.
Food additives must be in correct concentrations.
A driver is legally impaired at 0.08 mg/mL blood alcohol content.
Chemists control the concentration of chemicals using the concepts we will develop in this unit.
![Page 5: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/5.jpg)
Concentration
Concentration-the amount of solute that is dissolved into a solvent
Concentrated-when a solution has a high concentration of solute
Dilute-when a solution has a low concentration of solute
![Page 6: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/6.jpg)
Concentration…
Concentration can be described in terms of “weak” or “strong”, “concentrated” or “dilute”, but these are both relative terms and can be subjective.
![Page 7: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/7.jpg)
Molarity
Molarity is one way to measure concentration; it is the number of moles of solute per liter of solution.
The unit of molarity is mol/L, which can be abbreviated with an uppercase M.
![Page 8: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/8.jpg)
The concentration of a solution tells you how much solute that is dissolved in a given amount of solvent (water).
The molarity is the concentration of a solution.
Molarity = MolesLiter
1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity.
Molarity =
![Page 9: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/9.jpg)
The concentration of a solution tells you how much solute that is dissolved in a given amount of solute (water).
The molarity is the concentration of a solution.
Molarity = MolesLiter
1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity.
Molarity = 2.255 moles4.0 L
![Page 10: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/10.jpg)
The concentration of a solution tells you how much solute that is dissolved in a given amount of solute (water).
The molarity is the concentration of a solution.
Molarity = MolesLiter
1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity.Molarity = 2.255 moles = 0.56 moles = 0.56 M(Molar)
4.0 L Liter
![Page 11: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/11.jpg)
2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity.
Molarity =
![Page 12: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/12.jpg)
2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity.
Molarity = 5.00 g 1
![Page 13: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/13.jpg)
2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity.
K = 39.0 (mass off periodic table)O = 16.0H = 1.0 56.0 g/mol
Molarity = 5.00 g x 1 mole 1 56.0 g
![Page 14: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/14.jpg)
2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity.
K = 39.0 (mass off periodic table)O = 16.0H = 1.0 56.0 g/mol
Molarity = 5.00 g x 1 mole 1 56.0 g
0.250 L
![Page 15: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/15.jpg)
2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity.
K = 39.0 (mass off periodic table)O = 16.0H = 1.0 56.0 g/mol
Molarity = 5.00 g x 1 mole 1 56.0 g
0.250 L
= 0.356 M
![Page 16: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/16.jpg)
3. How many moles are there in 205. mL of a 0.172 M solution?
![Page 17: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/17.jpg)
3. How many moles are there in 205. mL of a 0.172 M solution?
0.172 moles 1 L
![Page 18: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/18.jpg)
3. How many moles are there in 205. mL of a 0.172 M solution?
0.172 moles x 0.205 L 1 L 1
![Page 19: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/19.jpg)
3. How many moles are there in 205. mL of a 0.172 M solution?
0.172 moles x 0.205 L = 0.0353 moles 1 L 1
![Page 20: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/20.jpg)
4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?
![Page 21: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/21.jpg)
4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?
0.250 L
1
![Page 22: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/22.jpg)
4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?
0.250 L x 0.500 moles
1 1 L
![Page 23: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/23.jpg)
4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?
0.250 L x 0.500 moles x 58.5 g
1 1 L 1 mole
![Page 24: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/24.jpg)
4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?
0.250 L x 0.500 moles x 58.5 g = 7.31 g
1 1 L 1 mole
![Page 25: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/25.jpg)
5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.
![Page 26: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/26.jpg)
5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.
0.1000 L 1
![Page 27: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/27.jpg)
5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.
0.1000 L x 0.250 moles 1 1 L
![Page 28: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/28.jpg)
5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.
0.1000 L x 0.250 moles x 58.5 g 1 1 L 1 mole
![Page 29: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/29.jpg)
5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.
0.1000 L x 0.250 moles x 58.5 g = 1.46 g 1 1 L 1 mole
![Page 30: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/30.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
![Page 31: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/31.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
25.0 g 1
![Page 32: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/32.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
25.0 g x 1 mole 1 129.9 g
![Page 33: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/33.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
25.0 g x 1 mole x 1 L 1 129.9 g 0.200 mol
![Page 34: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/34.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
25.0 g x 1 mole x 1 L x 1000 mL 1 129.9 g 0.200 mol 1 L
![Page 35: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/35.jpg)
6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?
25.0 g x 1 mole x 1 L x 1000 mL = 962 mL 1 129.9 g 0.200 mol 1 L
![Page 36: Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you](https://reader030.vdocument.in/reader030/viewer/2022032415/56649efb5503460f94c0daaf/html5/thumbnails/36.jpg)
7. Describe how you would prepare 100.0 mL of a 0.200 M solution of CoCl2.
0.1000 L x 0.200 moles x 129.9 g = 2.60 g1 L 1 mole
Weigh 2.60 g of CoCl2
Dissolve in water
Transfer to a 100 mL volumetric flask and fill to the line