Evidence of chemical change practice 2

Posljednje ažuriranje almost 5 years ago

32 questions

1

During a chemical reaction the temperature of the combined substance increases and a solid is formed.

Physical change

chemcial change

what is your evidence ?

when a solution od sodium sulfide and cadmium notrate are mixed , a solid yellow percipitate is formed.

physcial change

chemcial change

what is you evidence ?

During a chemical reaction one liquid settled at the bottom of the beaker and the other liquid rose to the top.

physcial change

chemcial change

what is your evidence ?

During a chemical reaction a clear liquid settle at the bttom of the beaker and the other liquid rose to the top.

physcial change

chemcial change

what is your evidence ?

Alka seltzer tablet produce bubbles.

physical change

chemical change

what is your evidence

Candle wax melting

physcial change

chemical change

what is your evidence

food coloring dropped into water to give it color .

physical change

chemical change

what is your evidence

paper caught fire

physical change

chemical change

what is your evidence

power2 poweder 1 =amonia odor

physcial change

chemical change

what is your evidence

powdery substance dissolved in water

physical change

chemical change

what is you evidence

During a chemical reaction , Temperature dropped dramatically after adding the liquid.

physical change

chemical change

what is your evidence

two liquids combining and a solid form

physical change

chemical change

what is your evidence

colorless gass+colorless gass____brown gas

physical change

chemical change

what is your evidence

blue solution+zinc blue solution__zinc in clear solution

physical change

chemical change

what is your evidence

mixing salt and pepper

physical change

chemical change

what is your evidence

Baking soda absorb ydrochloric acid

chemical change

physical change