To all chem buffs

[sam]

Experiment 1: In this experiment the chemical reaction is double displacement, the two compounds combine to form silver iodide (floating precipitate). Sodium nitrate is not soluble so it doesn’t take part in the reaction


hows that sound for #1?

[Kurt_]

...I'm in grade 11. I dunno what you're tlaking about . We did touch on Nuclear reactinos, and I don't think we did any light in chemstiry, although we did a bunch in physics.

[Kurt_]

Sam, that's wrong. It DOES take part in the reaction. THe Nitrate combines with the silver.

[Xiro]

we are do diffraction gradings, frequency and wavelenghts etc. I'm only a sophomore this year but im taking calculus based physics AP and chem AP next year. This year i'm just in honors chem...

[Kurt_]

Experiment #4

2H2O2(l) + MnO2(catalyst) => 2H2O(l) + O2(g)

Decomposition Reaction

In this reaction, The oxygen is freed from the hydrogen peroxide to form water and oxygen gas.
You can test for oxygen by putting a glowing splint above the liquid. If it glows more intensly, oxygen is present.

The maganese dioxide acts as a catalyst, speeding up the reaction. This is the black liquid.


@Xiro: Clearly your school system is much different than ours.

[sam]

Experiment 1: In this experiment the chemical reaction is double displacement, the two compounds combine to form silver iodide (floating precipitate). Sodium nitrate is soluble and doesn’t take part in the reaction.

So that would be right?

And how about this for 2

Experiment 2: In this experiment the chemical reaction is single displacement, the metal plus water reacts with each other resulting in CaOH plus H2. Hydrogen gas is produced in this chemical reaction.

[Kurt_]

Experiment #5

2Mg + O2 => 2MgO

Synthesis Reaction

When you stick the magnesium ribbon into the flame, the magnesium gains enough energy to rapidly react with the oxygen in the air, forming magnesium oide much faster than if the magnesium ribbon was left out in the open.
The ash/smoke produced is Magnesium oxide.



And for number one you didn't change anything

Here:

Experiment 1: In this experiment the chemical reaction is double displacement. The two compounds combine to form silver iodide (floating precipitate) and Sodium Nitrate. Sodium nitrate is soluble in water and therefore is not visible at the end of the reaction, due to the fact that it is in its aqueous state and neither the sodium nor nitrate ions produce a colour when dissolved in water.

Experiment 2: In this experiment the chemical reaction is single displacement, the metal plus water reacts with each other resulting in CaOH plus H2. Hydrogen gas and Calcium hydroxide are produced in this chemical reaction. The bubbles produced are the hydrogen gas, and the Calcium hydroxide is soluble in water, and therefore is not visible after the reaction is complete.

[sam]

For #3 what type of reaction is it?

Single displacement
Double displacement (neutralization)
synthesis
decompisition
combustion (complete /incomplete)



ALSO

Are you sure its not combustion for #5?

[Kurt_]

My bad.

#3 is a neutralization reaction

#5 is combustion (which is a kind of synthesis, in a way)