Mixturs and solutions
What type of mixtures are evenly mixed?
Homogenous mixtures
Does an endothermic reaction absorbe or realize energy
Endothermic reaction absorbes energy.
What theory explains that particles must collide to react?
Collision theory
What is equilibrium in a chemical reaction?
When forward and reverse reaction rates are equal.
What ion do acids produce in water?
Hydrogen ions (H⁺).
Define soluble and insoluble
Soluble-able to dissolve in solvent
Insoluble-unable to dissolve in solvent
What is the chemical term for ‘’ energy can’t be created or destroyed only changed”.
Law of conservation of matter.
Student is increasing temperature during reaction what is happening with reaction rate?
Reaction rate is increasing
If K is very large, are products or reactants favored?
Products are favored.
What is the pH of a neutral solution?
7.
What is the formula for molarity
M=moles of solute/liters of solution
Calculate the heat required to raise 50 g of water from 20°C to 80°C.
Q=50×4.18×60Q=50×4.18×60Q=12540 JQ=12540J
Rate compares two quantities with different units list at least 3 of them.
miles/hour Steps/day $/pound
According to Le Chatelier’s Principle, what happens if temperature increases in an endothermic reaction?
The reaction shifts toward the products.
What happens in a neutralization reaction?
An acid reacts with a base to form water and a salt.
What happens to a solution when more solvent is added?
The solution becomes more concentrated and diluted
Name 2 formulas for Heating curve.
Q=mcΔTQ Q=mH(fusion or vaporization)
When activation is energy is high why is it higher for reaction to happen?
Because particles need more energy to reach the activated complex
Write the equilibrium expression for
N₂ + 3H₂ ⇌ 2NH₃
Keq=[NH₃]²÷([N₂][H₂]³
What is the conjugate base of H₂SO₄ after it donates one hydrogen ion (H⁺)?
HSO₄⁻
How many grams of 3.3% protein solution should be given intravenously to a patient so that he will receive 200 grams of protein
3.3%/100=0.033
0.033=200g/litters of solution
liters of solution=200/0.0033
liters of solution=6060.6L
During melting, heat is absorbed. True or false? Explain why.
True. Heat is absorbed because energy is used to break the intermolecular forces holding the solid together, allowing it to become a liquid.
Name and describe the factors affecting reaction rates.
Surface area-more area=faster reaction,
Concentration-more particles=faster reaction,
Temperature=higher temperature=particles move faster=faster reaction ,
Catalyst=speeds up the reaction by lowering activation energy,
Inhibitors=slow down or blocks reaction occur
For the reaction:
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
At equilibrium, the concentration values are:
[N₂] = 0.50 M, [H₂] = 0.30 M, [NH₃] = 0.40 M
A solution has a hydrogen ion concentration of 1 × 10⁻⁵ M. What is the pH, and is the solution acidic, basic, or neutral?
The pH is 5, so the solution is acidic.