chemistry

What are the products of a neutralization reaction?

Salt and water

What is the oxidation number of Oxygen when combined with Fluorine?

+2. Oxygen has an oxidation state of +2 when combined with Fluorine.

What is the formula for pH?

-log[H3O]

What are the oxidation numbers for Zn in the following reaction: Zn + HCl ZnCl + H?

0 to +2. Zn goes from 0 to +2.

What is the pH of [OH] = 1.0 * 10^-5 solution?

9. The pH is equal to 9.

In addition to hydronium ions which type of ion do acids produce? (Choose all that apply)

Anion, A negative ion, Acids also produce a negative ion (anion)).

Which type of ion usually undergoes reduction?

Anion. Anions undergo reduction because they gain electrons.

What is a solution with a pOH value of 2 considered?

Base. A pOH<7 is basic, pOH > 7 is acidic, and a pOH =7 is neutral.

What is another term for alkaline solution?

Basic solution. A basic solution and alkaline solution are the same things.

What type of solution contains more [OH]?

Basic solutions. Basic solutions contain more [OH].

Which base would produce the salt Ca3(PO4)2?

Ca(OH)2. Ca(OH)2 would produce Ca3(PO4)2.

What type of ion undergoes oxidation?

Cation. Cation's undergo oxidation because they lose electrons.

How does an indicator differentiate between an acid and base?

Changes color. An indicator changes color when the pH changes.

What type of change does electrolysis cause?

Chemical change. Electrolysis causes a chemical change via the application of electricity.

What property of a substance does the titration process identify?

Concentration. Titration is a process in which a solution of unknown concentration is determined by using a solution of known concentration.

Which types of reaction is neutralization classified as?

Double replacement

What are bases categorized as since they generate current when placed in water?

Electrolytes. Because bases generate current in water they are considered electrolytes.

What happens to the electrons of a reducing agent during a reaction?

Electrons are lost. The reducing agent gets oxidized during a redox reaction so the electrons are lost.

Which element is oxidized in the following reaction: FeCl + Cl FeCl?

Fe

Which salt would HI and NH4OH produce?

NH4I

Why does Hydrogen have a oxidation state in the compound NaH?

Na has a lower electronegativity than H. Hydrogen has a -1 oxidation state in NaH because Na has a lower electronegativity than Hydrogen.

Which base reacted to give the salt NaCl?

NaOH. NaOH is the base that needs to react to get salt NaCl.

Which types of solutions contain equal [H3O] and [OH]?

Neutral solutions. Neutral solutions have equal [H3O] and [OH].

What type of reaction occurs when an acid reacts with a base?

Neutralization reaction. When an acid reacts with a base a neutralization reaction occurs.

Which type of reaction mixes an acid and base?

Neutralization. A neutralization reaction mixed an acid with a base.

What is the goal of neutralization reactions?

Neutralize the substances

What substance does a neutral substance release?

No substance. A neutral substance is neither an acid or base therefor it doesn't release a substance.

Which element is reduced in the following reaction: Mg + O MgO?

O. The Oxygen (O) is reduced.

What must one, or more, element change for it to be considered a redox reaction?

Oxidation number. For a redox reaction to occur one or more elements has to change oxidation numbers.

What is an oxidizing agent responsible for?

Oxidizing another substance. An oxidizing agent is a substance that oxidizes another substance and gets reduced in the process.

Which indicator should be used for a pH change from 7 to 8? (Choose all that apply)

Red litmus, Cyanidin. There are four different indicators that could be used for this pH range; cyanidin, red litmus, phenolphthalein and phenol red indicator.

What color would the cyanidin indicator turn in an acidic solution? (Choose all that apply)

Red, Purple. The cyanidin indicator turn three different colors in acidic solution; red (pH0-2 ), cerise (pH 3 ), purple (pH 4), and blue (pH 5-6 ).

What color would a solution that contains more OH moles than HO moles cause a phenol red indicator to turn?

Red. Phenol red indicators turn red in basic solutions (solutions that have more OH moles than HO).

What is another term for oxidation-reduction reaction? (Choose all that apply)

Redox reactions. Electron transfer reactions. Oxidation-reduction reactions are also referred to as redox and electron transfer reactions.

What does a neutralization reaction produce?

Salt and water. A neutralization reaction produces salt and water.

What forms when an acid is mixed with a base?

Salt.

When is a substance reduced during an oxidation reduction reaction?

Same time as one substance is being oxidized. In oxidation reduction reactions one substance is oxidized while the other is simultaneously reduced.

What is the pH of [H3O]= 2.4 * 10^-3 M?

3. The pH is equal to 3, the positive value of the exponent.

What could the pH of a solution be if a cyanidin indicator turned blue? What is used to determine the endpoint of a titration? (Choose all that apply)

5,6,7 Cyanidin indicator turns blue in solutions with a pH of 5-7 .

Which is a property of an acid? (Choose all that apply)

Sour taste, Corrode metals, Some common properties of acid are sour taste and their ability to corrode metal.

Which is a property of a base? (Choose all that apply)

Bitter taste, Slippery, Some common properties of bases include: bitter taste, chalky appearance, and soapy or slippery feel.

Which pair are indicators made from?

Bronsted-Lowry acid and base

Which instrument is necessary to execute a titration?

Burette. A burette is the main instrument necessary for a titration.

What do electrochemical cells use to generate electricity?

Flow of electrons. Electrochemical cells use the flow of electrons to generate electricity.

What happens during reduction?

Gain of electrons. Reduction is the gain of electrons.

What happens when an atom undergoes reduction?

Gains electrons. Reduction is a gain of electrons.

Which acid would produce the salt Ca3(PO4)2?

H3PO4. H3PO4 would produce Ca3(PO4)2.

Which acid reacted to give the salt NaCl?

HCl. In order to produce NaCl there had to be a HCl acid reacting.

Which acid would produce the salt Al(ClO3)3?

HClO3

Which acid would produce the salt Zn(NO3)2?

HNO3

What does an acid produce when it is placed in water?

Hydronium ion (H3O), An acid produces hydronium ions (H3O) when placed in water.

What does a base release when it is placed in water?

Hydroxide ion (OH) A base releases hydroxide ions (OH) when it is placed in water.

What happens during oxidation?

Loss of electrons. Oxidation is a loss of electrons.

What is the difference between acids and strong acids?

Strong acids release all of their H3+O ions

Where does oxidation occur in an electrochemical cell?

The anode. Oxidation occurs at the anode in an electrochemical cell.

Where does reduction occur in an electrochemical cell?

The cathode. Reduction occurs at the cathode in an electrochemical cell.

Which scenario indicates that the reduction process occurred? (Choose all that apply)

The oxidation number decreases, Compound loses Oxygen. Reduction occurs when: the oxidation number of an element decreases, an element gains electrons, compound loses Oxygen, or the compound gains Hydrogen.

Which scenario indicates that the oxidation process occurred? (Choose all that apply)

The oxidation number increases , Compound adds Oxygen. Oxidation occurs when: the oxidation number of an element increases, an element loses an electron, compound adds Oxygen, or the compound loses Hydrogen.

What is the oxidation state of Hydrogen in H2O?

The oxidation state for Hydrogen in water is +1.

What is the oxidation state of O2?

The oxidation state of O is 0.

What is the range of the pH scale?

The pH scale ranges from 0 to 14.

What is the sum of the pH and pOH?

The sum of pOH and pH is 14

What is the sum of the oxidation states in a compound?

The sum of the oxidation states in a compound = 0.

What is the term for the solution with the known concentration in a titration?

Titrant

Which indicator displays orange in acidic solutions?

Universal indicator. The universal indicator turns orange in acidic solutions with a pH of .

What color would the methyl orange indicator turn in a KOH solution?

Yellow. The methyl orange indicator turns red in acids and yellow in bases and KOH is a base.

What is chemically happening when the equivalence point is reached during titration?

moles of H3O = moles of OH

Which pH value would be considered basic?

pH = 10. Bases have a pH value greater than 7.

Which pH values would be considered acidic? (Choose all that apply)

pH = 6 pH = 2 Acids have pH values less than 7.

Water is a neutral solution, what is the pH of water?

pH = 7. Neutral solutions have a pH of 7.

What does the pH of a solution have to be in order to be a base?

pH of 8. Bases have a pH higher than 7