For most chemical reactions in this book, solids are labeled (s), liquids (l), and gases (g). The numerical coefficients in front of the chemical formulas express the moles of each compound or element. The preceding reaction can be interpreted in terms of moles or masses. (See Table 1.) Notice that the total mass of the reactants (243.73 g) equals the total mass of the products. This demonstrates the law of conservation of mass, which applies to all chemical reactions. It is not true, however, that volumes must be conserved in reactions involving gases.
Since these tractors were only made from 1977-1978, are they considered 'rare' or 'collectable' from a collectors standpoint? Since I am a Wheel Horse guy and really do not know that much about JD garden tractors, I would like to ask a few questions about this particular model. I currently have a 1978 John Deere 312 with a 46' mower deck.
The complete combustion of carbon monoxide is a case in point: Because the reaction coefficients are proportional to relative volumes of each gas, 2 volumes of carbon monoxide and 1 volume of oxygen (a total of 3 volumes of reactants) combine to produce only 2 volumes of carbon dioxide. In gaseous reactions, the total volume of the products may be less than, or equal to, or greater than the total volume of the reactants. How many liters of oxygen (O 2) are required for the complete oxidation of 1 gram of methane when the following reaction occurs at STP?
Chemical Reactions Questions. Bring on the tough stuff. List the different types of chemical reactions and give a brief description. Write the generic form of each type of chemical reaction. Give a specific example for each type of chemical reaction. Make sure the equations are properly balanced.
State the type of reaction and balance it properly: NaOH + CaBr 2 → Ca(OH) 2 + NaBr. What is the Law of Conservation of Mass, and how does it relate to chemical reactions?. When balancing a chemical equation, is it okay to adjust the subscript in a formula?. State the type of reaction and balance it properly: C 8H 18 + O 2 → CO 2 + H 2O. Predict the products that will result when these reactants combine and write a balanced chemical equation for each: Fe + CuSO 4 → Br 2 + MgCl 2 → Mg + AlCl 3 →.
What is an activity series and how does it relate to chemical reactions?. State the type of reaction and balance it properly: Pb(NO 3) 2+ AlCl 3 → PbCl 2 + Al(NO 3) 3. List the different types of chemical reactions and give a brief description.
Synthesis, decomposition, single displacement, and double displacement. A synthesis reaction occurs when two elements or compounds combine to form a more complex molecule. A decomposition reaction is the opposite of a synthesis reaction, and occurs when a molecule breaks apart to form two elements or less complex molecules. Single displacement reactions occur when a single element reacts with a chemical compound and switches places with one of the elements in the compound. Double displacement reactions occur when the cations of two ionic compounds switch places. Write the generic form of each type of chemical reaction. Synthesis: A + B → AB Decomposition: AB → A + B Single displacement: AB + C → AC + B Double displacement: AB + CD → AC + BD 3.
Give a specific example for each type of chemical reaction. Make sure the equations are properly balanced. Synthesis: 8 Fe + S 8 → 8 FeS Decomposition: 2 H 2O 2 → 2 H 2 + O 2 Single displacement: Fe + CuSO 4 → Cu + FeSO 4 Double displacement: AgNO 3 + NaCl → AgCl + NaNO 3 4. State the type of reaction and balance it properly: NaOH + CaBr 2 → Ca(OH) 2 + NaBr. Double displacement: 2 NaOH + CaBr 2 → Ca(OH) 2 + 2NaBr 5.
What is the Law of Conservation of Mass, and how does it relate to chemical reactions? The Law of Conservation of Mass states that matter cannot be created nor destroyed. This means that all chemical reactions must be properly balanced so there are the same number and type of each atom on each side of the reaction arrow.
When balancing a chemical equation, is it okay to adjust the subscript in a formula? It is absolutely NOT okay to adjust the subscript in a formula because changing the subscripts changes the chemical identity of the compound.
Instead, only coefficients can be altered when balancing a chemical equation. State the type of reaction and balance it properly: C 8H 18 + O 2 → CO 2 + H 2O.
Combustion: 2 C 8H 18 + 25 O 2 → 16 CO 2 + 18 H 2O 8. Predict the products that will result when these reactants combine and write a balanced chemical equation for each: Fe + CuSO 4 → Br 2 + MgCl 2 → Mg + AlCl 3 → Fe is above Cu in the activity series, therefore the first reaction will occur because Fe is more reactive than copper. Fe + CuSO 4 → FeSO 4 + Cu Cl is more reactive than Br because Br is listed below Cl in the activity series. This means no reaction will occur.
Mg is listed above Al in the activity series, therefore this reaction will occur because Mg is more reactive than Al. 3 Mg + 2 AlCl 3 → 2 Al + 3 MgCl 2 9. What is an activity series and how does it relate to chemical reactions? An activity series is a list of metals (or halogens) in order of decreasing reactivity. It is used to predict which reaction will occur. For example, a metal with a higher activity will replace a metal with a lower activity in a single displacement reaction.
The same is true for halogens. State the type of reaction and balance it properly: Pb(NO 3) 2+ AlCl 3 → PbCl 2 + Al(NO 3) 3.
Double Displacement Reaction: 3 Pb(NO 3) 2+ 2 AlCl 3 → 3 PbCl 2 + 2 Al(NO 3) 3.