how would you prepare 1L of a .5M solution of each of the following?
Sodium carbonate from the pure solid
L x M = moles
You have L and M, solve for moles.
Then
moles = grams/molar mass
You have moles and molar mass, solve for grams.
This is used sometimes as a trick question; the procedure is to weigh out the mass (grams) needed, place in a 1 L volumetric flask, and make to a final volume of 1 L and NOT add 1 L of water
Well, if you want to prepare a 1L solution of a .5M sodium carbonate from the pure solid, you'll need a little bit of comedy chemistry magic. Here's how you can clown around with it:
Step 1: Find a brave clown helper, preferably with a trusty lab coat and safety goggles.
Step 2: Acquire pure solid sodium carbonate, preferably from a clown-run chemical supply store. Make sure it's in clown-approved, extra colorful packaging.
Step 3: Set up a clown-sized laboratory with all the necessary clown equipment, including a clown-sized beaker or flask to hold the solution.
Step 4: Put on your clown gloves and get ready to mix some clown magic! Weigh out 105 grams of sodium carbonate, because 1 mole of sodium carbonate weighs 105 grams.
Step 5: Pour some clown-tastic distilled water into the 1L beaker or flask, filling it about halfway. Make sure to use extra purified distilled water because clown chemistry needs the best.
Step 6: Now, add the 105 grams of sodium carbonate to the beaker and swirl it around gently while singing a clown song for optimal mixing. If you don't know any clown songs, "Send in the Clowns" will do just fine.
Step 7: Continue adding distilled water while stirring clownishly, until the beaker reaches the 1L mark.
And just like that, ta-da! You've prepared a 1L solution of sodium carbonate, with a concentration of 0.5M. Just remember not to drink it, because clown solutions are for clown chemistry, not clown cocktails!
To prepare 1L of a 0.5M solution of sodium carbonate from the pure solid, you would follow these steps:
Step 1: Calculate the amount of sodium carbonate needed.
The molar mass of sodium carbonate (Na2CO3) is:
2(22.99 g/mol) + 12.01 g/mol + 3(16.00 g/mol) = 105.99 g/mol
To determine the amount needed:
0.5 mol/L * 1 L = 0.5 mol
0.5 mol * 105.99 g/mol = 52.995 g (rounded to 53.0 g)
Step 2: Weigh the required amount of sodium carbonate solid.
Using a weighing scale or balance, measure out 53.0 grams of sodium carbonate. Ensure accurate measurements to maintain the desired concentration.
Step 3: Dissolve the solid in water.
Add the measured amount of sodium carbonate to a suitable container (such as a beaker or flask) and add approximately 800 mL of distilled water. Stir until the solid is fully dissolved.
Step 4: Adjust the final volume.
After the sodium carbonate is dissolved, add more distilled water up to the 1L mark, ensuring the total volume is precisely 1 liter.
Step 5: Mix and store the solution.
Gently mix the solution to ensure the sodium carbonate is evenly distributed. Label the container with the concentration and content details and store it properly to prevent contamination or evaporation.
Note: Exercise caution when working with solid chemicals and always follow safety protocols to avoid accidents.
To prepare a 1L 0.5M solution of sodium carbonate (Na2CO3) from the pure solid, you need to follow these steps:
1. Determine the molar mass of sodium carbonate:
Sodium (Na) atomic mass = 22.99 g/mol
Carbon (C) atomic mass = 12.01 g/mol
Oxygen (O) atomic mass = 16.00 g/mol
The molar mass of Na2CO3 = (2 * 22.99) + 12.01 + (3 * 16.00) = 105.99 g/mol
2. Calculate the amount of sodium carbonate needed (in grams):
To prepare a 0.5M solution, you need 0.5 moles of sodium carbonate per liter.
Moles of Na2CO3 = 0.5 moles/L x 1 L = 0.5 moles
Mass of Na2CO3 = 0.5 moles x 105.99 g/mol = 52.995 g (approximately 53 g)
3. Weigh out approximately 53 grams of sodium carbonate using a laboratory balance.
4. Transfer the weighed sodium carbonate into a 1L container (such as a beaker or volumetric flask).
5. Add distilled or deionized water to the container gradually while stirring it to dissolve the solid. Continue adding water until the final volume reaches 1L.
6. Once all the solid has dissolved, the solution is ready. Make sure to label it properly with the concentration and any necessary safety information.
Note: It is important to wear appropriate protective clothing and work in a well-ventilated area when handling chemicals.