Many speculative procedures because that the ready of solutions speak to for stirring the solvent while adding the solute. I m sorry of the following is always an effect of this procedure?

A. The decreases the solubility the the solute. Incorrect. Stirring or agitation speed the dissolving price by raising the lot of collisions between particles.

B. It brings the solute and also solvent rapidly right into contact. Correct!

C. The decreases the reactivity the the solute. Incorrect. Stirring or agitation speeds the dissolving rate by increasing the amount of collisions between particles.

D. It produces a double replacement reaction. Incorrect. Stirring or agitation speeds the dissolving rate by increasing the amount of collisions in between particles.

Hexane is a nonpolar solvent, if water is a polar solvent.

You are watching: Is ammonium chloride polar or nonpolar


Solute

Water

Hexane

C10H8, naphthalene

Insoluble

Soluble

NH4Cl, ammonium chloride

Soluble

Insoluble

CO(NH2)2, urea

Soluble

Insoluble

C2H5OH, ethanol

Soluble

Soluble


Which of the above examples demonstrates a nonpolar solute in a polar solvent?

A. CO(NH2)2 in hexaneIncorrect. Polar substances dissolve in polar solvents. If the substance is dissolve in water, it is polar.

B. C2H5OH in hexaneIncorrect. Polar building materials dissolve in polar solvents. If the substance is soluble in water, that is polar.

C. NH4Cl in waterIncorrect. Polar substances dissolve in polar solvents. If the substance is soluble in water, that is polar.

D. C10H8 in waterCorrect!

How numerous moles of HNO3are necessary to do 4.0 liters that a 2.5 M systems of HNO3?

A. 2.5 Incorrect. Molarity = moles/Liters.

B. 10 correctly!

C. 5 Incorrect. Molarity = moles/Liters.

D. 20 Incorrect. Molarity = moles/Liters.

A chemistry engineer desires to reaction 500g of marble (CaCO3) v excess hydrochloric acid. In which of the complying with forms will the marble react many rapidly?

A. A solid sphere Incorrect. Smaller particles have a larger surface area and react faster.

B. Fine powder Correct!

C. Small chips Incorrect. Smaller sized particles have actually a bigger surface area and also react faster.

D. A hard cube Incorrect. Smaller sized particles have a larger surface area and react faster.

A chemist all set a equipment by heating 100 milliliters that water while adding KCl crystals till the crystals would not dissolve. He then sealed the clear solution and set it aside. After a couple of hours he experienced that the solution had end up being cloudy and also some hard had resolved to the bottom the the beaker. I beg your pardon statement ideal describes what happened?

A. Water molecules, trapped with the KCL crystals, to be released after heating. Incorrect. As the temperature that a solution decreases, the solubility that the solute decreases.

B. At lower temperatures, the solubility of the KCL decreased and recrystallization occurred. Correct!

C. As the solution cooled, evaporation of water increased the KCl concentration past its solubility. Incorrect. Lowering the temperature walk not cause water to evaporate.

D. At boosted temperatures, the solubility the KCl increased and also remained too high after cooling. Incorrect. Together the temperature that a equipment decreases, the solubility that the solute decreases.

A solution that contains much more solute than it can dissolve in ~ a offered temperature is –

A. Dissociated Incorrect. Dissociation is a process in i m sorry ionic link separate into smaller charged particles.

B. Saturated Incorrect. Saturated remedies have precisely the maximum amount of solute that have the right to dissolve.

C. Supersaturated correct!

D. Unsaturated Incorrect. An unsaturated solution can dissolve much more solute without an altering any conditions.

Which solute responds the most to temperature change?

A. K2SO4Incorrect. Find the curve with the steepest slope.

B. NaCl Incorrect. Discover the curve through the steepest slope.

C. KClO4Incorrect. Discover the curve through the steepest slope.

D. KNO3Correct!

The graph listed below shows the solubilities of various salts in 100 grams of water in ~ a variety of temperatures.

What fixed of NH4Cl is required to type a saturated solution if the NH4Cl is dissolved in 100 g of water in ~ 48°C?

A. 30.0 g Incorrect. Uncover the Y intercept in ~ 48°C.

B. 56.0 g Incorrect. Uncover the Y intercept at 48°C.

C. 40.0 g Incorrect. Find the Y intercept in ~ 48°C.

D. 50.0 g yes!

Which statement ideal describes why water dissolves many salts?

A. Water is polar, and salts type ions in solution. Correct! Ionic compounds contain fee particles and also dissolve in polar solutions prefer water.

B. Water has a different density than salts. Incorrect. Ionic link contain fee particles and dissolve in polar solutions favor water.

C. Water is nonpolar, and also salts type ions in solution. Incorrect. Ionic compounds contain fee particles and also dissolve in polar solutions prefer water.

D. Water has actually the same thickness as salts. Incorrect. Ionic compounds contain charged particles and dissolve in polar solutions choose water.

The link NaOH is classified together an Arrhenius base because, when the molecule dissolves in water, over there is an increase in the concentration of –

A. Hydrogen ions Incorrect. Arrhenius bases dissociate OH- ion in solution.

B. Sodium ions Incorrect. Arrhenius bases dissociate OH- ions in solution.

C. Hydroxide ions Correct!

D. Oxide ions Incorrect. Arrhenius bases dissociate OH- ion in solution.

A sample the water has a pH of 6 in ~ 25°C. What is the hydroxide concentration in this water sample?

A. 1 × 10-6 MIncorrect. = 1 × 10-pH

B. 6 × 10-8 MIncorrect. = 1 × 10-pH

C. 1 × 10-8 MCorrect! = 1 × 10-pH

D. 6 × 10-6 MIncorrect. = 1 × 10-pH

Which substance deserve to be classified as either an acid or a base according to the Bronsted-Lowry definition?

A. NH41+Incorrect. This compound would certainly only lose a H+ and also be thought about an acid.

B. HOH yes! Water can accept a H+ and be thought about a base, or lose a H+ and be thought about an acid.

C. H3O1+Incorrect. This compound would certainly only lose a H+ and also be thought about an acid.

D. HCl Incorrect. This compound would certainly only shed a H+ and be considered an acid.

Which the the complying with is a oxidization reaction?

A. 2H2O(l) → 2H2(g) + O2(g)Correct! Hydrogen and also oxygen have a readjust in oxidation state.

B. CaCO3(s) → CaO(s) + CO2(g)Incorrect. No adjust in oxidation state has occurred.

C. NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)Incorrect. This is one acid-base reaction.

D. 2NH4Cl(s) + Ca(OH)2(s) → 2NH3(g) + 2H2O(l) + CaCl2(s)Incorrect. No change in oxidation state has occurred.

What is the pH the a systems of NaOH through a hydroxide concentration the = 1 × 10-4 M?

A. -10 Incorrect. H+= KW/, pH= -log

B. -4 Incorrect. H+= KW/, pH= -log

C. 4 Incorrect. H+= KW/, pH= -log

D. 10 Correct!

Compared to a weak acid, a solid acid will —

A. Kind more easily with a weak basic Incorrect. An acid is considered solid or weak based upon its dissociation.

B. Form more slowly with a weak base Incorrect. An acid is considered strong or weak based upon its dissociation.

C. Dissociate less than 95 percent of its ion Incorrect. A solid acid will certainly dissociate 100 percent the its ions.

D. Dissociate 100 percent the its ion Correct!

The diagram listed below illustrates one apparatus provided to check the conductivity of assorted solutions, and the table shows the degree of dissociation that some common acids.

*

The more powerful an mountain or basic is, the better it conducts electricity.

Which the the adhering to would make the pear glow most brightly?

A. NH3Incorrect. NH3 has actually a an extremely low level of dissociation.

B. H2CO3Incorrect. H2CO3 has a low degree of dissociation.

C. HNO3Incorrect. HNO3 doesnot have the highest level of disassociation of the price choices.

D. H2SO4Correct!

Which that the following chemical reaction is correctly labeled?

A. 2KBr(aq) + Pb(NO3)2 →2KNO3(aq) + PbBr2(s), neutralizationIncorrect. This is a precipitate reaction because a solid product is formed.

B. MgCl2(aq) + Ca(OH)2(aq) → Mg(OH)2(s) + CaCl2(aq), acid-baseIncorrect. This is a precipitate reaction due to the fact that a hard product is formed. Over there is no acid current in the reactants.

C. 3CaCl2(aq) + K3PO4(aq) → Ca3(PO4)2(s) + 6KCl(aq), precipitationCorrect! A hard is formed.

D. NaHCO3(s) + NaOH(aq) → Na2CO3(aq) + H2O(l), oxidation-reductionIncorrect. Over there is not a adjust in oxidation state.

Consider the reaction presented below.

NaCl(aq) + AgNO3(aq)àNaNO3(aq) + AgCl(s)

This reaction can accurately it is in classified as a(n) –

A. Acid base reaction Incorrect. No reactant is an mountain or a base.

B. Precipitation reaction yes! A hard is created from two aqueous reactants.

C. Combustion reaction Incorrect. Oxygen is not a reactant and water is not formed.

D. Oxidation palliation reaction Incorrect. Over there is no adjust in oxidation state.

Three 10g samples of sugar are represented below.

*

Which sample would certainly dissolve the more quickly in 100mL the water at 30oC?

A. A Incorrect. Smaller sized particles have actually a bigger surface area and react faster.

B. B Incorrect. Smaller sized particles have actually a bigger surface area and also react faster.

C. C Correct!

D. Castle all will dissolve in ~ the very same rate. Incorrect. Smaller sized particles have a bigger surface area and react faster.

A pharmacist needs to mix 20g that crystals of compound A and 10g the crystals of link B. The mixture is then put in 120mL of water come make cough syrup.

Which set of problems will reason the compounds to dissolve the fastest?

A.

Size of

Crystals (mm)

Temperature

(°C)

Stirring

(Y/N)?

0.01-0.02

22.3

N

Incorrect. Stirring enhanced the temperature and the smaller fragment size increased reactions.

B.

Size of

Crystals (mm)

Temperature

(°C)

Stirring

(Y/N)?

0.1-0.2

49.9

N

Incorrect. Stirring enhanced the temperature and also the smaller particle size increased reactions.

C.

Size of

Crystals (mm)

Temperature

(°C)

Stirring

(Y/N)?

0.1-0.2

22.3

Y

Incorrect. Stirring enhanced the temperature and the smaller particle size increased reactions.

D.

Size of

Crystals (mm)

Temperature

(°C)

Stirring

(Y/N)?

0.01-0.02

49.9

Y

Correct!

Which that the complying with solutions has the highest concentration the solute?

A. 1.0 mol solute in 200mL of solvent correct!

B. 2.0 mol solute in 250 mL of solvent Incorrect. Concentration is measured v Molarity (M=mol the solute/L the solution).

C. 3 mol that solute in 1L that solvent Incorrect. Concentration is measured v Molarity (M=mol of solute/L the solution).

D. 4 mol the solute in 1.5L the solvent Incorrect. Concentration is measured through Molarity (M=mol the solute/L that solution).

A crystal of KCl is liquified in water. I beg your pardon of the following statements describes why the dissolved salt does no recrystallize?

A. K+ and Cl- ions shed their fees in water. Incorrect. Ions will retain their charges in water.

B. Water molecule surround the K+ and also Cl- ions. Correctly!

C. K+ and Cl- ion leave the solution through evaporation. Incorrect. The ions will remain liquified in water.

D. Water molecules chemically react with K+ and Cl- ions. Incorrect. Water will merely dissolve the ions.

Which best explains why water dissolves many salts?

A. Water is polar, and also salts break right into ions in solution. Correctly!

B. Water is nonpolar, and salts break right into ions in solution. Incorrect. Water is a polar molecule.

C. Water has actually the same thickness as salts. Incorrect. Thickness does not explain solubility.

D. Water has actually a different thickness than salts. Incorrect. Thickness does not describe solubility.

Some chemistry student were experimentation the solubility of lead carbonate when merged with different metal ions. Based on their observations below, write a ascendancy for the solubility that carbonate. Include appropriate group number or names.

Observations:

Na+

Ca2+

Li+

Mg2+

K+

CO32-

Carbonate

No reaction

Precipitate formed

No reaction

Precipitate formed

No reaction

Based on these monitorings which ascendancy is correct?A. All lead carbonate compounds space soluble. Incorrect. Team 2 compounds room insoluble.

B. All carbonate compounds space insoluble. Incorrect. Group 1 compounds room soluble.

C. Carbonate compounds the contain team 1 steels are insoluble. Incorrect. No precipitate is formed with team 1 compounds.

D. Carbonate compounds the contain team 1 metals are soluble. Correct! Compounds that contain team 1 metals are constantly soluble and also do not type precipitates.

In the diagram below, sodium carbonate is dropped into a test pipe containing calcium chloride.

*

The white precipitate that formed is most most likely –

A. NaCl Incorrect. All group 1 compounds are soluble.

B. CaCO3Correct!

C. Na2CO3Incorrect. All team 1 compounds space soluble.

D. CaCl2Incorrect. CaCl2 is a reactant in this reactant.

Which of the following impacts is developed by the high surface tension of water?

A. Lakes don’t freeze heavy in winter in spite of low temperatures. Incorrect. Freeze is not pertained to surface tension.

B. A water strider have the right to walk throughout the surface ar of a tiny pond. Yes!

C. Organisms resist temperature changes, back they offer off heat due to chemical reactions. Incorrect. This is explicate the high details heat the water.

D. Water can act as a solvent. Incorrect. Solvent ability is no the exact same as surface tension.

Which that the adhering to compounds would have the highest conductivity value once put into solution?

A. NaCl Incorrect. NaCl only dissociates right into two ions.

B. MgF2Incorrect. MgF2 only dissociates right into 3 ions.

See more: In The Name Of The Father Son And Holy Spirit In Latin, Translate In The Name Of The Father And In Latin

C. FeCl3Correct!

D. Need more information Incorrect. Counting the variety of ions in the formula.

Which of the following will kind ions and conduct electrical energy when added to water?

I. NaOH

II. Al2O3

III. NH3

IV. CH3OH

A. I just Incorrect. II will also dissociate right into ions.

B. II only Incorrect. I will likewise dissociate into ions.

C. I and II Correct!

D. I, II, III, and also IV Incorrect. III and IV will not dissociate right into ions.

Classify the following reaction:

HCl + NaOH→H2O + NaCl

A. Acid-base reaction correctly!

B. Oxidation-reduction reaction Incorrect. Water and an ionic compound are formed.