Chemical Equations

The chemical equation for the reaction between barium and selenium is: Ba + Se → BaSe. This reaction forms barium selenide.

NaN3 (sodium azide) decomposes into Na (sodium) and N2 (nitrogen gas). The chemical equation is:

2 NaN3(s) → 2 Na(s) + 3 N2(g)

The balanced chemical equation for the reaction is: 2Li + Br2 -> 2LiBr. To find the limiting reactant, we convert the given masses to moles, determine the mole ratio from the balanced equation, and compare the actual mole ratio of the reactants to the required mole ratio.

The chemical equation for the reaction between aqueous strontium sulfide (SrS) and aqueous copper sulfate (CuSO4) is:

SrS + CuSO4 → SrSO4 + CuS

Strontium sulfate (SrSO4) and copper sulfide (CuS) are the products of this double displacement reaction.

The balanced chemical equation for the reaction between acetyl salicylic acid (aspirin) and sodium bicarbonate (baking soda) is:

C9H8O4 (aspirin) + NaHCO3 (sodium bicarbonate) -> C9H7O4Na (sodium acetylsalicylate) + CO2 + H2O

Fe + S = FeS

The balanced chemical equation for the reaction of sulfur dioxide with water is: SO2 + H2O → H2SO3

The balanced chemical equation for the decomposition of potassium chlorate (KClO3) is:

2KClO3(s) → 2KCl(s) + 3O2(g)

If you mean the equation for the production of NO from the elements at STP, it would be:

N2 + O2 => 2NO

OR

½N2 + ½O2 => NO

CO2 + C → 2CO Carbon dioxide combines with carbon to form carbon monoxide (in the laboratory) by passing CO2 over heated charcoal. In the environment, it is formed by incomplete oxidation of hydrocarbons.

The chemical equation for the reaction between barium nitrate (Ba(NO3)2) and potassium sulfate (K2SO4) is Ba(NO3)2 + K2SO4 -> BaSO4 + 2KNO3. It forms barium sulfate (BaSO4) and potassium nitrate (KNO3) as the products.

2Fe(s) + 2H2O(l) + O2(g) ==> 2Fe2+(aq) + 4OH-(aq)

This is the equation for rust. ---- NOT EXACTLY

Rust is a solid, it doesn't exist as ions in solution. Also, in rust, iron is in the +3 oxidation state. There are three common forms of rust. Rust formed under water is Fe(OH)3. Rust formed in humid air is FeO(OH). Only when rust has completely dehydrated will you see it as Fe2O3.

The reaction for the rust that we see around us most often is:

4Fe(s) + 3O2(g) + 2H2O(l) --> 4FeO(OH)(s)

FeO(OH) is also formed naturally, and is the mineral called goethite.

1. Write and balance the chemical equation.
2. Convert the given amount of reactant to moles.
3. Use the stoichiometry of the balanced equation to determine the moles of the product formed.
4. Finally, convert the moles of the product to the desired unit (grams or volume) if necessary.

When NH4Cl is heated, it decomposes into NH3 gas and HCl gas. The balanced chemical equation for this reaction is: NH4Cl(s) -> NH3(g) + HCl(g).

The chemical equation for the reaction of acetylene (C2H2) with two molecules of Br2 (bromine) is:

C2H2 + 2Br2 → C2H2Br4

The chemical equation for the reaction aluminum underwent in the disaster is 4Al + 3O2 -> 2Al2O3. This reaction produces aluminum oxide (Al2O3) when aluminum (Al) reacts with oxygen (O2) in the air.

Sodium Acetate Can be fond in 2 forms. Either anhydrous or trihydrate. Oxidation reaction with anhydrous form is easier than trihydrate form. First form has reaction similar to that of Oxidation of Acetic Acid. Trihydrate form is a bit more complex and I'm still loking into it

Metallic zinc dissolves in the alkaline solution, producing zincate ions and releasing hydrogen: Zn + 2OH– → ZnO2-- + H2 (visible as tiny bubbles on the surface of the zinc) You can get the same solution by adding zinc oxide to sodium hydroxide. (The zincate is probably hydrated with a couple of water molecules, but they only clutter up our equations, so we'll ignore them here.) Here's where it gets interesting: When copper is in contact with zinc* (bear with me for a few moments), in a conducting solution, an electrolytic cell is produced -- you have a battery. (In fact, you have Prof. Volta's original battery!) Electrons flow from the zinc* to the copper. At the surface of the copper coin, these electrons reduce the zincate: ZnO2-- + 2H2O + 2e- → Zn + 4OH– This produces the zinc plating you see on the coin. At the surface of the zinc*, the electrons that are being sent to the copper metal are generated by zinc dissolving to produce more zincate: Zn + 4OH– → ZnO2-- + 2H2O + 2e- Here's the cool thing: There is NO NET REACTION, but there is a net motion of zinc! The "zinc*" referred to above can be left-over zinc powder from the first step, or it can be zinc that's already built into the coin. Post-1981 US pennies, which are in fact mostly zinc with a thin copper cladding, work fine without an external zinc supply. It would seem that microscopic flaws in the cladding are necessary to let the zinc core contact the solution -- so perhaps "mint" condition pennies do need an external zinc source. (Science project, anyone?) The reaction seems at first glance to run against the electrochemical potentials of the metals, which perplexes many people. What makes it run, however, is the unseen dissolution of the metallic zinc*, which is particularly invisible in the case of a new US penny. (This is the same reaction that allows "sacrificial anodes" of zinc or magnesium to protect ship hulls against corrosion in salt water.) The experiment is more impressive, actually, with a true copper coin. Clean an old penny (1981 or earlier) by soaking it in hot vinegar until it's shiny, and drop it into the plating solution. Nothing will happen unless the penny is in contact with some zinc metal. Separate the penny from the zinc, and the plating will dissolve -- the penny returns to its original copper color. Touching the penny with a bit of zinc recreates the battery, and the zinc plating re-appears within seconds! Heating the zinc=plated penny, or just letting it sit around for several months, results in copper atoms dissolving into the zinc to produce brass - the "gold" coin is actually a brass-plated coin. This explanation, with more details and some great photos, can be found at http://woelen.scheikunde.net/science/chem/exps/copper+zinc/index.html -Jim Demers (9/4/2008)

The chemical equation for the formation of polyethylene (polythene) is the polymerization of ethylene (C2H4) molecules, resulting in the repeating unit -(CH2-CH2)-. The reaction is typically represented as [CH2=CH2]n, where n represents the number of repeating units in the polymer chain.

Balancing Chemical Equations is absolutely essential if you want to determine quantities of reactants or products. An unbalanced chemical equation gives only the identify of the beginning reactants and the final products using the appropriate formulas as well as the conditions of temperature, physical state, and pressure conditions under which the reaction is to operate under.

However an unbalanced equation can say nothing about the quantities involved until the equation has been balanced. A balanced equation assures that the conservation law of matter is obeyed. The total mass of reactants must equal the total mass of products. A balanced equation tells you the proportional quantities of each substance involved.

The Balanced reaction equation is

2HCl(aq) + CaCO3(s) = CaCl2(aq) + H2O(l) + CO2(g)

Type of reaction is 'neutralisation'. The acid is being neutralised to a salt, water and carbon dioxide.

It can also be thought of as an 'Acid + Carbonate' reaction.