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dissolution is physical property
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What is the difference between physical and chemical dissolution?
Physical dissolution is purely mechanical; an example would be shaking a bottle of Italian salad dressing, the different ingredients mix but don't form a new substance. Chemical dissolution produces new substances; for example, mixing NaOH with HCl forms water and table salt, two chemicals different from what you had to begin with. Also, dissolving table salt in water is a chemical change, though it may not seem like it.When adding water:NaCl (s) => Na+ (aq) + Cl- (aq)This is a very soluble ionic compound and it changes from a neutral compound to ions, a chemical change.The dissolution of non-ionic compounds, such as sugar, is not a chemical reaction because sugar doesn't separate to ions in solution. i.e., this is a physical dissolution.When adding water:C6H12O6 (s) => C6H12O6 (aq)The dissolution of weak electrolytes is somewhat more complicated. Let's consider acetic acid (vinegar).When adding water:CH3COOH (s) => CH3COOH (aq)Although we write the dissolution for a weak acid or weak base this way, it differs from the sugar example because we know that, actually, some of the molecules go to CH3COO- and H3O+. We don't write this, though, because although some molecules have undergone a chemical reaction, that population is a minority.
Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
What is the substance called that undergoes a change in a chemical change?
The compound(s) (there can be more than one) that exist(s) before the change is/are called reactant(s).
Does magnesium hydroxide dissolve in water?
Magnesium oxide does not "dissolve" in hydrochloric acid. Dissolution is a physical change. When magnesium oxide is mixed with hydrochloric acid, a chemical reaction takes place: Mg(s) + 2HCl ---> MgCl2(aq) + H2(g)
Is burning a candle a chemical change or a physical change give reason?
It is both a physical and chemical change. The burning of the wick s chemical while the candle melting being physical.
What will happen when you add cs2 to fe plus s and fes?
When CS2 is added to reaction mixture Fe + S = FeS , it would dissolve the excess 'S' leaving the solids Fe and FeS without any change.
What is the bond structure of cs2?
S=c=s
Which reaction shows that the enthalpy of formation of CS2 is H89.4 kj mol?
C(s) + 2S(s) + 89.4kJ --} CS2(l)
Which reaction shows that the enthalpy of formation of cs2 is hf 89.4 kJ mol?
C(s) + 2S(s) + 89.4 kJ --> CS2(l)
Rusting iron is it physical or chemical change?
I think it`s a chemical change.
What is the product of Carbon and Sulfur?
S=C=S Carbon disulphide CS2
How many lone pair electron are in CS2?
C=4e- (on periodic table you find C in the Group 4 / 4valence electrons) S=6e- (Group 6/ 6 valence electrons) multiply by 2 12e- 4e- + 12e- ____ 16 valence electrons in CS2
When a substance changes into a diffrent substance what change has occurred?
chemical change
What is the difference between physical and chemical dissolution?
Physical dissolution is purely mechanical; an example would be shaking a bottle of Italian salad dressing, the different ingredients mix but don't form a new substance. Chemical dissolution produces new substances; for example, mixing NaOH with HCl forms water and table salt, two chemicals different from what you had to begin with. Also, dissolving table salt in water is a chemical change, though it may not seem like it.When adding water:NaCl (s) => Na+ (aq) + Cl- (aq)This is a very soluble ionic compound and it changes from a neutral compound to ions, a chemical change.The dissolution of non-ionic compounds, such as sugar, is not a chemical reaction because sugar doesn't separate to ions in solution. i.e., this is a physical dissolution.When adding water:C6H12O6 (s) => C6H12O6 (aq)The dissolution of weak electrolytes is somewhat more complicated. Let's consider acetic acid (vinegar).When adding water:CH3COOH (s) => CH3COOH (aq)Although we write the dissolution for a weak acid or weak base this way, it differs from the sugar example because we know that, actually, some of the molecules go to CH3COO- and H3O+. We don't write this, though, because although some molecules have undergone a chemical reaction, that population is a minority.
Is sugar dissolved in water a chemical or a physical change?
it s a physical change.
What is the difference between chemical and physical chemical?
Physical dissolution is purely mechanical; an example would be shaking a bottle of Italian salad dressing, the different ingredients mix but don't form a new substance. Chemical dissolution produces new substances; for example, mixing NaOH with HCl forms water and table salt, two chemicals different from what you had to begin with. Also, dissolving table salt in water is a chemical change, though it may not seem like it.When adding water:NaCl (s) => Na+ (aq) + Cl- (aq)This is a very soluble ionic compound and it changes from a neutral compound to ions, a chemical change.The dissolution of non-ionic compounds, such as sugar, is not a chemical reaction because sugar doesn't separate to ions in solution. i.e., this is a physical dissolution.When adding water:C6H12O6 (s) => C6H12O6 (aq)The dissolution of weak electrolytes is somewhat more complicated. Let's consider acetic acid (vinegar).When adding water:CH3COOH (s) => CH3COOH (aq)Although we write the dissolution for a weak acid or weak base this way, it differs from the sugar example because we know that, actually, some of the molecules go to CH3COO- and H3O+. We don't write this, though, because although some molecules have undergone a chemical reaction, that population is a minority.
Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
