Chemical Stress & Reactions
What is the strongest type of intermolecular force in water?
Hydrogen Bonding!
What is the pH of a neutral solution at around 25°C?
The answer is 7!
How many moles are in 36g of water (H₂O)? in (H = 1, O = 16)
Answer: Molar mass = 18g/mol → 36g / 18 g/mol = 2 moles
Please calculate the molar mass of CO₂
Answer is shown to be: 12 (C) + 2×16 (O) = 44 g/mol
What is the strongest type of intermolecular force in water?
Answer shown: Hydrogen bonding
What will the system do if heat is added exothermic reaction at equilibrium?
It shifts left, towards the reactants!
What is the PH solution with [H⁺] = 1 × 10
The answer is 4!
Convert 5.0g of NaCl to moles. (Use this equation (Na=23, Cl=35.5)
Molar mass = 58.5 g/mol → 5.0 / 58.5 = 0.0855 mol
What are the products of double displacement reaction shown to be: AgNO₃ + NaCl → ?
Answer is: AgCl + NaNO₃
What causes water to have such a high boiling point compared to other molecules and its size?
Answer is: Hydrogen bonding
Equilibrium equation has N₂ + 3H₂ ⇌ 2NH₃ what will happen if the NH₃ is removed?
The system will start to shift to the right to replace the following removed product.
Identify the BLA, BLB, CA, CB in this reaction: HCl + H₂O → H₃O⁺ + Cl⁻
The answer to the question is: HCl = BLA, H₂O = BLB, H₃O⁺ = CA, Cl⁻ = CB
If shown and 4 mol is shown to react with 2 mol of B (A + B → AB), what is shown to be the limiting reactant?
The answer is: limiting reactant (1:1 ratio needs 4 mol B).
Will the element Zn react with the following elements CuSO₄ in a single displacement reaction?
Yes, Zn is shown to be more effective than Cu.
Name the following compound: Na₂SO₄
Sodium sulfate! (If you got this right, good job!)
How does ocean acidification relate to CO₂ levels.
Increasing atmospheric CO₂ dissolves sea water resulting in lower PH, and creating carbonic acid.
In HCl + H₂O → H₃O⁺ + Cl⁻ What is the ACBP and BCAP
The answer is: ACBP = HCl/Cl⁻; BCAP = H₂O/H₃O⁺
What is shown to be the molarity of a solution containing 0.5 mol of NaOH in 250 mL of water?
Here Is the answer:
M = mol/L = 0.5 / 0.25 = 2 M
Classify the reaction shown: 2H₂ + O₂ → 2H₂O
Answer is: Synthesis
Please write the formula for calcium chloride.
CaCl₂
What type of reaction is created when HCL is added to a solution of NaHCO₃ what is the net result shown?
The answer is: Antacid neutralization - acid base then to salt + water + CO₂.
How does increasing atmospheric CO₂ contribute to acid rain in any way?
CO₂ is shown to dissolve in clouds, forming carbonic acid which results in the lowering of rainwater and PH.
In the reaction shown 2H₂ + O₂ → 2H₂O, what is the mole ratio between O₂ and H₂O?
The answer is: 1:2
Balance the following equation: Al + _HCl → _AlCl₃ + _H₂
Answer is: 2Al + 6HCl → 2AlCl₃ + 3H₂
Please explain why NH₃ has hydrogen bonding but CH₄ does not?
NH₃ is shown to have N-H bonds while CH₄ lacks many electro atoms such as N, O, or even F.