le chatelier/acidification/antacids
Fe3+(aq)+SCN−(aq)⇌FeSCN2+(aq)Fe3+(aq)+SCN−(aq)⇌FeSCN2+(aq)
What will happen to the concentration of FeSCN2+ if more Fe3+ is added to the system at equilibrium? Why?
The concentration of FeSCN2+ will increase. Adding Fe3+ increases the concentration of a reactant, so the equilibrium shifts to the right
label BLA,BLB,CA,CB
NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq)
NH3: BLB
H2O: BLA
NH4+: CA
OH− : CB
what is a LR/ER?
what do displacement rxns involve?
replacing elements/switching places
What is the correct name for the compound with the formula K2O?
Potassium oxide
Explain how increasing atmospheric CO2, CO2 levels can lead to a decrease in the availability of carbonate ions (CO3 2−CO3 2−) in ocean water. Why is this a problem for marine organisms?
More atmospheric CO2 dissolves in seawater, forming carbonic acid, which dissociates and increases H+ concentration. The extra H+ reacts with carbonate ions to form more bicarbonate, decreasing the amount of available carbonate.
If a solution has a pH of 4.7, what is its pOH
pOH = 9.3
4 fractions, starting and ending town/roads driven on?
massfield/massfield, molar mass Dr/way
What is the molar mass of aluminum sulfate, Al2(SO4)
342.17g/mol
What is the correct name for the compound KClO3?
potassium chlorate
The following reaction is exothermic:
N2(g)+3H2(g)⇌2NH3(g)+heatN2(g)+3H2(g)⇌2NH3(g)+heat
If the temperature is increased, in which direction will the equilibrium shift? Explain your reasoning.
The equilibrium will shift to the left (toward the reactants). Increasing temperature adds heat, which acts as a product in an exothermic reaction. According to Le Chatelier’s Principle, the system will shift to use up the added heat, favoring the endothermic (reverse) direction
Explain how increased atmospheric CO₂ contributes to ocean acidification and affects marine life.
Increased atmospheric CO₂ dissolves in ocean water, forming carbonic acid, which releases H+H+ ions and lowers pH. This increased acidity reduces carbonate ion availability, making it harder for marine organisms like corals and shellfish to build shells and skeletons, threatening marine ecosystems
4 NH3+5 O2→4 NO+6 H2O
What is the mole ratio of NH₃ to H₂O, and how many moles of water are produced from 2.0 moles of NH₃?
Mole ratio NH₃:H₂O is 4:6, which simplifies to 2:3. For 2.0 mol NH₃: 2.0 mol×64=3.0 mol H2O2.0mol×46=3.0molH2O
Classify each reaction as synthesis, decomposition, single displacement, double displacement, or combustion:
a) 2H2 O2→2H2O+O2
b) 2C2H6+7O2→4CO2+6H2O
a. decomposition
b. combustion
What is the correct name for the compound Mg(NO3)2Mg(NO3)2?
The compound is named by stating the cation first, followed by the name of the polyatomic ion. Name: Magnesium nitrate
A+2B⇌C+DA+2B⇌C+D
If product C is continuously removed from the system as it forms, what will happen to the position of equilibrium?
The equilibrium will shift to the right, toward the products
What is the pH of a 0.0025 M HCl solution?
[H+] = 0.0025 M.
2 Al+3 Cl2→2 AlCl3+3Cl2
If you have 5.0 grams of aluminum and 6.0 grams of chlorine gas, which reactant is limiting, and how many grams of AlCl3 can be produced
Cl₂ is limiting; 7.57 g of AlCl₃ can be produced
Write the balanced molecular equation and predict the products for the reaction between aqueous solutions of sodium sulfate (Na2 SO4) and barium chloride (BaCl2)
Na2SO4(aq)+BaCl2(aq)→2NaCl(aq)+BaSO4(s)
Write the chemical formula for ammonium fluoride
NH4F
Write a balanced chemical equation for the reaction between calcium carbonate (CaCO3) and hydrochloric acid (HCl). What products are formed?
CaCO3(s)+2HCl(aq)→CaCl2(aq)+CO2(g)+H2O(l)
What is the pOH of a solution with [OH−]=0.155 M
pOH is 0.81
How many grams of water are produced when 18.0 grams of glucose (C6H12O6) are completely combusted?
C6H12O6+6 O2→6 CO2+6 H2O
10.8 g of H2O are produced
Balance the following equation:
C3H8+O2→CO2+H2O
C3H8+5O2→3CO2+4H2O
Write the chemical formula for calcium nitrate
Ca(NO3)2