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DnD - Do all substances dissolve? - Coggle Diagram
DnD - Do all substances dissolve?
What are ways to change variables?
What factors?
What would be ways to measure?
to measure the solubility of a solution, given the mass of the solute and the volume of the solvent, you divide mass in grams by volume in cc's and then multiply by 100.
What substances?
does the type of bonding effect how substances dissolve?
temperature, pressure, polarity, and molecular size
The stronger the intermolecular forces between solute molecule and solvent molecule, the greater the solubility of the solute in the solvent.
what are you dissolve the substances in?
A solvent is a substance that allows some other substance - known as a solute - to dissolve in it, forming a solution.
Stirring: Stirring the solute in the solvent can speed up the process of dissolving a solute in the solvent.
Temperature: The solute gets dissolved easily if a warm solvent is employed instead of a cold solvent.
Water, the Universal Solvent
What does dissolve mean?
Dissolve Definition in Chemistry
Stirring sugar into water is an example of dissolving. The sugar is the solute, while the water is the solvent. Dissolving salt in water is an example of dissolution of an ionic compound. The sodium chloride (salt) dissociates into sodium and chloride ions when it is mixed with water.
n chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
the attraction between the particles of the solvent and solute are strong enough to overcome the attraction of the particles of the solute for one another. Evaporation happens when water molecules move fast enough to break away from a solution and move into the air.
does temperature make a difference (water)?
Hot water
Polar molecules attract water molecules, mainly through hydrogen bonding. They compete successfully with hydrogen bonds between the water molecules, so they are readily soluble in water.
how much substance would you need (concentration)?
At 20°C, 35.7 g of the salt dissolve in 100 mL water. The solubility of sodium chloride is, then, 35.7 g/100 mL water at 20°C. Sodium chloride is a moderately soluble salt.
sugar is the solute and water is the solvent. A solution is formed when you dissolve a solute in a solvent. You know that your target sugar solution must be 7% w/w . This means that every 100 g of this solution must contain 7 g of sugar.
how to make a substance dissolve better?
Stirring a solute into a solvent speeds up the rate of dissolving
more heat facilitates
when more surface area is exposed
Are the substances safe?
salt is
What is the Chemistry behind it?
Dissolving happens when the attraction between the particles of the solvent and solute are strong enough to overcome the attraction of the particles of the solute for one another.
extremely polar hydrogen bonds.
how do you know if something is dissolved?
When a substance dissolves, it might look like it has disappeared, but in fact it has just mixed with the water to make a transparent (see-through) liquid called a solution.
The best way to tell if something will dissolve is to look at the polarities of the solvent and the solute.
when a homogenous solution is formed, with no suspended particles
what are the errors?
Equipment being faulty is a common systematic error.
what substances are dissolvable?
salt
lemon juice
coffee
suger
vinegar
what substances are no dissoluble?
pepper
sand
Stones
oil
flour
wax
variables