4.1-4.4 Chemical Reactions, balancing and Net Ionic
Is origami considered a physical reaction or a chemical reaction and why?
Physical! The material changes but the chemical composition is still the same
In the Brønsted–Lowry definition of acids and bases, an acid __________
is a proton donor.
What does Please Stop Calling Me A Careless Zebra Instead Try Learning How Copper Saves Gold stand for?
potassium, sodium, calcium, magnesium, aluminum, carbon, zinc, iron, tin, lead, hydrogen, copper, silver, gold
For the balanced equation shown below, how many moles of Na3PO4 will be produced, if 0.5531 moles of NaCl are produced?
3HCl + Na3PO4 → H3PO4 + 3NaCl
Na3PO4 yields: 1/3*0.5531=0.1844
What classes does Ms. Lee teach besides AP Chem?
Anatomy, Gen Chem, AVID
Fill in the blanks to balance the following equation
_ C10H16 + _CL2 => _C + _HCL
C10H16 + 8 Cl2 → 10 C + 16 HCl
What is the oxidation number for each element in Na3AsO3?
Na = +1
As = +3
O = -2
Calculate the pH of a solution prepared by adding 45.0 mL of a 0.213 M HCl solution to 125.0 mL of a 0.150 M solution of ammonia. The of ammonia is 4.75 at 25°C.
9.23
there are 10.0 g of sucrose and 10.0 g of oxygen reacting. Which is the limiting reagent?
C12H22O11 + 12O2 ---> 12CO2 + 11H2O
Oxygen is the limiting reagent
What Musician does Ms. Lee decorate her classroom with?
Taylor Swift
A chemical reaction has produced nickel (II) fluoride (NiF2). What is its solubility in water?
insoluble
Determine the oxidation state of each element in Mg(C2H3O2)2.
Mg = +2, C = 0, H = +1, O = -2
What is the pH of the solution after 25.00 mL of 0.200 NaOH M is added to 50.00 mL of 0.100 M acetic acid?
pH of the final solution is 8.794
A student isolated 25 g of a compound following a procedure that would theoretically yield 81 g. What was his percent yield?
Percent Yield = 31%
What kind of sport does Ms. Lee enjoy doing?
Running
Given this chemical reaction, write the balanced net ionic equation below.
HBr(aq) + Ba(OH)2(aq) → BaBr2(aq) + H2O(l)
H+ + OH- → H2O
In the following chemical reaction, which substance is oxidized and which substance is reduced?
H2S(g) + Cl2(g) → S8(s) + HCl(l)
H2S is oxidized (reducing agent);
Cl2 is reduced (oxidizing agent)
Balance the following redox reaction that takes place in acidic solution:
MnO4- + SO2 → Mn2+ + HSO4-
2 MnO4- + 5 SO2 + 2 H2O + H+ → 2 Mn2+ + 5 HSO4-
How many grams of hydrogen gas are needed to produce 105.0 grams of water, given the following unbalanced chemical reaction:
H2 + O2 ---> H2O
5.82848 mol of H2 required
What career was Ms. Lee planning on in college originally?
A nurse practitioner
Write the following equation as a complete ionic equation and a net ionic equation:
2Al(s) + 6HBr(aq) ---> 2AlBr3(aq) + 3H^2
Complete: 2Al(s) + 6H+(aq) + 6Br¯(aq) ---> 2Al3+(aq) + 6Br¯(aq) + 3H^2
Net: 2Al(s) + 6H+(aq) ---> 2Al3+(aq) + 3H^2
Balance the following redox reaction that takes place in acidic solution:
_ClO2- + _ H+ → _ ClO2 + _Cl- + _H2O
5 ClO2- + 4 H+ → 4 ClO2 + Cl- + 2 H2O
Balancing the redox reaction in acidic solution (half reaction)
Cr2O72¯ + Fe2+ ---> Cr3+ + Fe3+
14H+ + Cr2O72¯ + 6Fe2+ ---> 2Cr3+ + 7H2O + 6Fe3+
If 4.000 grams of hydrogen peroxide is placed within a sealed 250 milliliter container at 500 K. What is the pressure of the oxygen gas produced in atmospheres?
2H2O2 => 2H2O +O2
9.65 ATM
What was the title of the Wolfpacket article celebrating Ms. Lee published March 7, 2025?
Celebrating inspirational CHS women: Mrs. Lee’s journey to uplifting young minds