When you flame test the two solutions, any Na solution burns yellow, while any K solution burns violet/purple. So both the KCl and the KBr will burn purple, while both NaBr and NaCl will burn yellow.
physical change is when you physically change (your finger grows EG.). chemical is when a chemical in your body is affected (a drug that makes you produce more adrenaline EG.).
The diffence between chemical and physical is that ones chemical and ones physical!!
Yes. Silica is a compound with the formula SiO2, while silicon is an element with symbol Si. There are many chemical and physical differences between them.
Dissolution is usually considered a physical reaction, although weak chemical bonds between the solute and solvent may exist in the solution.
in changes. Physical changes can be reversed. E.g. if you were to melt a block of ice, and then freeze it again, it would to some degree be reversed. This is a physical change. However, if you were to burn a peace of toast, the change would be chemical. Once the toast is burnt you cant get it back.
A chemical change results in a change in chemical composition, while a physical change does not.
physical: water, wind, and temperature chemical: acid rain and rust
physical change are reversable
All physical and chemical properties are different.
Physical weathering is: frost, crystallization, exfoliation,, biological and pressure release. Chemcal weathering: anything with chemicals in it like carbonation, hydrolysis, solution, oxidation and hydration.
Physical changes are melting and boiling in this case; fire is a combustion, a chemical change.
physical weathering is weathering that you can reverse and chemical weathering is where you can' reverse it.
The physical change will keep the atoms the same not moving but the chemical change will make it move around with energy.
Physical changes are reversible changes, such as change of state (boiling, melting etc), chemical changes are when something undergoes a reaction changing it's chemical makeup.
(i) Physical change does not result in formation of new substances Chemical change result in formation of new substances (ii) Physical change is a temporary change Chemical change is a permanent change (iii) Physical change is reversible Chemical change cannot be reversed back (iv) e.g of Physical change-Dissolving of sugar in water to obtain a sugar solution e.g of Chemical change-Burning of sodium in chloride
A physical change is a change that does not change the chemical makeup of the substance. This can be crushing, tearing, or a phase change for example. A chemical change changes the chemical makeup of the substance. Some examples of this are rusting, combustion, or digestion.
go to http://evolution.berkeley.edu/evolibrary/article/0_0_0/evodevo_05 to understand what it is.