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Chemical Equations

A chemical equation is defined as the short-hand representation of a true chemical reaction with the help of symbols and formula. In this category, there are questions relating chemical equations, symbols and formula.

1,997 Questions

What is balanced chemical equation for calcium chloride and sodium stearate?

The balanced chemical equation for the reaction between calcium chloride (CaCl2) and sodium stearate (C17H35COONa) would be:

2 CaCl2 + 2 C17H35COONa -> 2 NaCl + Ca(C17H35COO)2

This equation shows that calcium chloride reacts with sodium stearate to produce sodium chloride (NaCl) and calcium stearate.

What is the importance of leveling and balancing?

Leveling and balancing are crucial for ensuring smooth operation and longevity of machinery and equipment. Leveling ensures that machines are stable and operate correctly, while balancing helps reduce vibrations, prevent unnecessary wear and tear, and improve performance. Proper leveling and balancing also contribute to the safety of operators and the surrounding environment.

What are the importance of leveling and balancing?

Leveling ensures that equipment or machines are stable and operate properly, preventing uneven stress or wear. Balancing ensures that rotating parts are evenly distributed in weight, reducing vibration and improving performance while extending the lifespan of the equipment. Both are crucial for ensuring safety, efficiency, and longevity of machinery.

Why is it incorrect to balance a chemical equation by changing the subscripts?

Changing subscripts in a chemical formula changes the identity of the compound being represented. Balancing a chemical equation involves changing the coefficients in front of the chemical formulas to ensure that the same number of each type of atom is present on both sides of the equation.

What are some examples of corrosion in chemical equation?

  1. Rusting of iron: Fe + O2 + H2O → Fe2O3•nH2O
  2. Formation of copper(II) oxide: 4Cu + O2 → 2Cu2O
  3. Corrosion of aluminum: 4Al + 3O2 → 2Al2O3
  4. Corrosion of silver: 4Ag + O2 + 2H2S → 2Ag2S + 2H2O

What is the correct net ionic equation for the reaction between HCl and NH3?

The correct net ionic equation for the reaction between HCl and NH3 is:

H+ (aq) + NH3 (aq) -> NH4+ (aq)

This is because H+ ions from HCl react with NH3 to form the NH4+ ion in the solution, with no observable spectator ions.

What is the balanced chemical equation of yhe rust reaction?

The balanced chemical equation for the rusting of iron is:

4Fe + 6H2O + 3O2 -> 4Fe(OH)3

What is the chemical equation for the laboratory preparation of ammonia?

The chemical equation for the laboratory preparation of ammonia is: N2(g) + 3H2(g) → 2NH3(g)

What information in a balanced chemical equation shows how many miles of a reactant are involved in the reaction?

A balanced chemical equation does not provide information on the physical amount or quantity of reactants involved in a reaction, such as miles. The coefficients in a balanced chemical equation represent the mole ratio of reactants and products, not physical quantities like miles. To determine how many moles or amount of reactant is involved in a reaction, one would need to use stoichiometry calculations based on the coefficients in the balanced equation and known quantities.

In a chemical equation the arrow indicating a reaction point in which direction?

The arrow in a chemical equation points from the reactants to the products, indicating the direction of the reaction. This arrow shows that the reactants are yielding the products.

Why do we say that chemical reactions always involve changes in energy?

Chemical reactions involve the breaking and forming of chemical bonds, which requires energy to overcome or release. This results in changes in the potential energy of the system. Additionally, the activation energy required to start a chemical reaction is a clear demonstration of energy change.

What are products and where are they located in chemical equations?

Products are the substances that are formed as a result of a chemical reaction. In a chemical equation, the products are located on the right side of the arrow, which represents the reaction taking place.

What is the balanced equation for the reaction between sodium trioxocarbonate IV and dilute hydrochloric acid?

The balanced equation for the reaction between sodium carbonate (sodium trioxocarbonate IV) and dilute hydrochloric acid is:
Na2CO3 (s) + 2HCl (aq) -> 2NaCl (aq) + H2O (l) + CO2 (g)

When copper is heated in air write chemical equation?

When copper is heated in air, it undergoes oxidation to form copper(II) oxide. The chemical equation for this process is:

2Cu(s) + O2(g) → 2CuO(s)

What quantitative information is revealed by a chemical equation?

A chemical equation reveals the stoichiometry of the reaction, which includes the ratios of reactants and products involved in the reaction. This information helps determine the quantities of substances needed for a reaction and the amounts of products that will be formed. It also provides information on the conservation of mass during the reaction.

What are the molecules on the left side of a chemical equation calle?

Reactants. They are on the left side of the yield sign in a chemical equation and on the other side is the product.

Is the number that appears before a formula in a chemical equations?

The number that appears before a formula in a chemical equation represents the coefficient, which indicates the ratio of moles of each substance involved in the reaction. It is used to balance the equation so that the same number of each type of atom is present on both sides of the reaction.

What is the ionic equation of baking soda and sulphuric acid?

The ionic equation for the reaction between baking soda (sodium bicarbonate, NaHCO3) and sulfuric acid (H2SO4) is:

HCO3- + H+ -> H2O + CO2

This reaction forms water and carbon dioxide gas.

What is a general chemical equation for an endothermic double replacement reaction?

The general chemical equation for an endothermic double replacement reaction is AB + CD → AC + BD, where energy is absorbed from the surroundings. This type of reaction usually occurs in the presence of heat or other sources of energy to facilitate the breaking and reforming of chemical bonds.

What is the chemical equation for propane grill?

The chemical equation for burning propane in a grill is: C3H8 + 5 O2 → 3 CO2 + 4 H2O. This equation represents the combustion of propane, where propane (C3H8) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water vapor (H2O) as products.

What is the balanced chemical equation for water and copper II oxide?

The balanced chemical equation for the reaction between water and copper(II) oxide is:

CuO + H2O → Cu(OH)2

What is the chemical equation of cellular respiration?

The chemical equation for cellular respiration is:

C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy (ATP)

What information do you get from a chemical equation?

A chemical equation provides details on the reactants, products, and stoichiometry of a chemical reaction. It specifies the identities of the substances involved and the ratios in which they combine or are produced. Additionally, it helps to balance the mass and charge of the atoms in a reaction.

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