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How much CaCl2.6H2O and water must be weighed to prepare 100g of a solution that is 5 percent CaCl2?
do you mean 100 ml? most solutions are given in terms of volume not mass. But ...
CaCl2 has a molar mass of 111 g The hydrated form also contains 108 g water. This gives a total mass of 219 g for the hydrated form.
The solution must contain: 100 g x 5% = 100 x 5/100 = 5g anhydrous CaCl2
5 / x = 111 / 219
solve for x: x = 5(219)/111 = 9.865 g of the hydrate
What else can I help you with?
How do one prepare 0.01M butanesulphonate?
To prepare a 0.01M solution of butanesulphonate, you would weigh out the appropriate amount of butanesulphonate compound needed to achieve a concentration of 0.01 moles per liter in a certain volume of solvent (usually water). You would dissolve the weighed compound in the solvent and then make up the final volume to reach the desired concentration. Finally, you would mix the solution thoroughly to ensure homogeneity.
When you created salt water solution if you evaporate the water how many mg of salt would be left behind?
Exactly the same amount of salt as you weighed out to make the salt water solution in the first place.
What is one potential benefit of genome sequencing that can be weighed against possible negative effects?
Knowledge of your genome could help you prepare for, or even prevent, some diseases.
How to make a project on comparative study on antacids?
· Prepare half litre of N/10 HCl solution by diluting 10 ml of the concentrated acid to 1 litre. · Prepare N/10 sodium carbonate solution by weighing exactly 1.325 g of anhydrous sodium carbonate and then dissolving it in water to prepare exactly 0.25 litre of solution. · Standardize the HCl solution by titrating it against the standard sodium carbonate solution using methyl orange as indicator. · Take 20 ml of standardized HCl in the conical flask, use methyl orange as indicator and see the amount of base used for neutralization. · Powder the various sample of antacids tablets and weigh 10 mg of each. o Take 20 ml of standardized HCl solution in the conical flask; add the weighed samples to it. o Add two drops of methyl orange and warm the flask till most of the powder dissolves. Filter off the insoluble material. o Titrate the solution against the standardized Na2C03 solution till a permanent red tinge appears. o Note the amount of base used for titration and note the reduction in the amount of base used. o Repeat the experiment with different antacids.
Can a solid be weighed?
Yes, a solid can be weighed on a scale. The weight of a solid is the force exerted by gravity on the object, which can be measured in units like grams or kilograms.
If someone weighed 200 pounds and lost 58 what percent did they lose?
29 percent
How do one prepare 0.01M butanesulphonate?
To prepare a 0.01M solution of butanesulphonate, you would weigh out the appropriate amount of butanesulphonate compound needed to achieve a concentration of 0.01 moles per liter in a certain volume of solvent (usually water). You would dissolve the weighed compound in the solvent and then make up the final volume to reach the desired concentration. Finally, you would mix the solution thoroughly to ensure homogeneity.
How can you determine the amount of salt presented in a saturated solution?
Only by experiments. For example the solution is heated, water is evaporated and the salt weighed.
What percent of your body weight did you lose if you weighed 190 and now weigh 160?
You weighed 190 and lost 30 so you now weigh 160. 30 divided by 190 = 0,157 so 16%
How do you prepare 1N alcoholic koh solution?
To prepare a 1N alcoholic KOH solution, you will need to dissolve the appropriate amount of potassium hydroxide (KOH) pellets in a specific volume of anhydrous ethanol. First, calculate the molecular weight of KOH (39.10 g/mol) and then measure out the required weight to make a 1N solution. Once weighed, slowly add the KOH pellets into the anhydrous ethanol while stirring until fully dissolved. Check the final volume to ensure it reaches 1N concentration. Remember to handle KOH with care as it is caustic and generate heat when dissolving in ethanol.
What is standard solution in titration?
A standard solution in titration is a solution of known concentration that is used to determine the concentration of another solution. It is typically a primary standard that can be accurately weighed and dissolved to make a solution of precise concentration. Standard solutions are essential in titration to accurately measure the volume of the solution being titrated and calculate its concentration.
When Joe graduated from high school he weighed 160 pounds. After college he weighed 192 pounds. What is the percent increase of his weight during college?
192/160 - 1 = 12/10 -1 = 1.2-1 = 0.2 = 20%
When you created salt water solution if you evaporate the water how many mg of salt would be left behind?
Exactly the same amount of salt as you weighed out to make the salt water solution in the first place.
What is one potential benefit of genome sequencing that can be weighed against possible negative effects?
Knowledge of your genome could help you prepare for, or even prevent, some diseases.
What percent of my body weight did i lose if weighed 205 and now weight 185?
1-185/205 = 0.0976 So you lost about 9.8%
What is a sentence for weighed?
The vet weighed the dog.All the bags are weighed before they are checked in at the airport.
US coins are weighed by what type of measurement?
Some are weighed by ounces but most are weighed by grams.
