- What do the compounds CaO, K20 and FeO have in common?
Your answer:
They are all metal oxides of metallic elements from the alkaline earth metals.
They are all metal oxides that react with water to form acidic solutions and are also known as acid anhydrides.
They are all metal oxides that react with water to form basic solutions and are also known as basic anhydrides.
They are all nonmetal oxides that react with water to liberate hydrogen gas.
- Why does water, when poured into a test tube, form a concave surface meniscus?
Your answer:
The cohesive forces within the liquid exceed the adhesive forces between the liquid and the walls of the tube.
The adhesive forces between the liquid and the walls of the tube exceed the cohesive forces within the liquid.
The adhesive forces between the liquid and the walls of the container equal the cohesive forces within the liquid.
This phenomenon has no relation to adhesive and cohesive forces.
- Under room temperatures and one atmosphere pressure, which one of the following substances would be the most volatile?
Your answer:
water
water ice
"dry" ice
sodium chloride crystals
- Which one of the following elements does not participate in hydrogen bonding?
Your answer:
oxygen
nitrogen
chlorine
fluorine
- Which one of the following statements is not true concerning solutions?
Your answer:
Aqueous solutions are transparent and colorless.
Aqueous solutions contain solute particles that are molecular or ionic in size.
Aqueous solutions are homogeneous mixtures of two or more components.
Aqueous solutions contain solute particles that are uniformly distributed throughout the solution that will not precipitate unless solution conditions change.
- Increasing a solution's temperature results in a decreased solubility for which one of the following chemical components?
Your answer:
sodium chloride
glucose sugar
carbon dioxide
potassium chloride
- Which of the following substance pairs won't form a solution?
Your answer:
NaCl(s) and H20(l)
kerosene and lubricating oil
C02(g) and N2(g)
olive oil and H20(l)
- Which one of the following actions will not cause a supersaturated solution to rapidly crystallize, precipitating the excess solute?
Your answer:
stirring the supersaturated solution
heating the supersaturated solution
dropping a seed crystal into the supersaturated solution
scratching the walls of the supersaturated solution's container
- Which of the following properties is not characteristic of bases?
Your answer:
bitter or caustic taste
solutions change litmus paper from blue to red
possess the ability to interact with acids
possess a slippery, soapy feeling
- Chemists use the terms ionic compound and __________ interchangeably.
Your answer:
metal oxide
salt
base
acid
- Which one of the following compounds is a nonelectrolyte?
Your answer:
C6H1206(aq) (glucose)
H2SO4(aq)
NaOH(aq)
HCl(aq)
- Respectively, what are the minimum, midpoint and maximum values of the pH scale?
Your answer:
0,7,14
1,7,14
1,10,20
0,5,10
- The pH scale measures the concentration of _______ ions in solution.
Your answer:
- In which of the states of matter (s, l, or g) should a substance's constituent particles be farthest apart?
Your answer:
- Should increasing the temperature of water increase(i), decrease(d), or not affect(na) the rate at which ionic solids dissolve? Enter a single lower case letter for the answer.
Your answer:
- The pH scale is a logarithmic scale. Therefore each whole unit difference on the scale indicates a ____ fold (number) difference in the acidity of a solution. Enter a number.
Your answer:
- The reaction of aqueous sodium hydroxide and hydrochloric acid results in a type of double-displacement reaction called ________________.
Your answer:
- The molarity (M) of a solution is defined as the number of ________ of the solute per liter of solution.
Your answer:
- Household ammonia, with a pH of 11, would be classified as an acid or a base?
Your answer:
- Coca-Cola, with a pH of 3, would be classified as an acid or a base?
Your answer:
- If 50.g of ice at 0.0°C were added to 2.0 L of water at 70.°C, what would be the final temperature of the mixture? The specific heat of water = 4.184J/g°C and the heat of fusion of water = 335J/g.
Your answer:
- Calculate the number of moles of water that can be obtained from 200 g of cobalt (II) chloride hexahydrate. You must use a periodic table.
Your answer:
- Calculate the mass percent of the following solution: 25.5g NaNO3 plus 300.g H20.
Your answer:
- Assume that 25.00 mL of 0.3000 M NaOH are required to neutralize 15.00 mL of monoprotic acid (donates one mole of H1+ per formula unit). Calculate the moles of base used, the moles of acid consumed in the neutralization reaction, and enter the molarity of the monoprotic acid.
Your answer:
- Calculate the pH of lemon juice, 4.8e-3 M [H1+] to 0.1 unit.
Your answer:
- Calculate the pH of household ammonia, 4.8e-12 M [H1+] to 0.1 unit.
Your answer:
- Aqueous hydrogen sulfide and liquid water are formed by the element hydrogen bonding to oxygen and sulfur, both Group VI A elements, and both possess a bent molecular structure. Hydrogen sulfide has the higher molar mass, yet the melting point, boiling point, heat of fusion, and heat of vaporization of water is markedly higher than that of hydrogen sulfide. Why?
Your answer: