chemistry

Chemical reactions involve _____________ and _______________.

Reactants and products

So, when Na replaces Ag it joins with (NO3) but when it does, something happens when Ag is now attracted to Cl- (and joins with it)... remember a double "displacement"... Now the AgCl becomes ____________.

insoluble

I listed two examples of "causative agents" or in other words items that might cause a decomposition reaction to occur... one was "heat" the other was?

light

According to the activity series of metals can Na replace Ag?

no

By "Chemistry definition" for this lectures purposes did Mr. Day create an "aqueous" solution when he put a piece of gravel in a beaker of water?

no

In the lecture we discussed "replacing"... will just any element / atom automatically replace another?

no

Is Fe + O2 = Fe2O3 balanced?

no

Is a "skeleton equation" balanced?

no

"Balanced" means to have the same _________ of a particular element on both sides of the equation.

number of atoms

A combination reaction usually results in only ________ product.

one

Looking at the directions for "how to" "balance" chemical equations, it is suggested that you try to balance elements ________ at a time.

one

Water enters into a _____________ covalent bond.

polar

Water's _______________ is what makes it such a good solvent.

polarity

So, in this lecture we eventually cover an example of a "chemical reaction" that takes place in aqueous solution.. this reaction was a double replacement reaction in which we have 2 products: 1 is still "soluble" the other becomes an "insoluble" solid called a?

precipitate

In Chemical reactions, _______ change into one or more __________.

reactants - products

An arrow going both ways still means the same as number 5, but it really tells us that the reaction is ______________.

reversible

In a ___________ ___________ reaction both the reactants and the products are an element and a compound.

single replacement

(s) means

solid

Look at slide 13 in the notes.. even though Na is attracted to (NO3)... and even though we say that Na can replace Ag... we find out that NaNO3 is still _________________ in water...

soluble

Choose the answer that shows a true word pair association in which both terms mean the same thing:

soluble : dissociate

So, in Chemistry "solubility" is the ability for a given substance, the _____________ to dissolve / dissociate in a solvent.

solute

An aqueous solution is one in which water is a good _____________.

solvent

We know from earlier in the year that the number written slightly below the element symbol (behind it) is called a ________

subscript

Rule number 4 for balancing chemical equations: You can never change ________________.

subscripts

True or False NaCl in H2O is an "aqueous solution" ?

true

When balancing equations "all" numbers must be _______ _______. 2 terms... (just like empirical and molecular formulas).

whole numbers

If I wrote "Iron + Oxygen yields Iron (III) Oxide" I would be using a _____________ equation.

word

Can an arrow point to the left and the right at the same time?

yes

Could a chemical reaction result in more than one product?

yes

If I had a compound with nickel as the existing cation and I introduced calcium... could there be a replacement?

yes

An arrow in the equation literally means ________.

yields

The arrow in the written chemical equation means:

yields

KClO3 = KCl + O2 Balanced reactant?

2KClO3

P + Cl2 = PCl5 balance this: Give me P

2P

Al + O2 = Al2O3 so, what should the "balanced" formula be?

4Al + 3O2 = 2Al2O3

What percentage of the adult human body is H2O?

66%

Al + Cl2 = AlCl3 Would I have a coefficient in front of AlCl3? If so, what?

2

Zn + FeCl3 = Fe + ZnCl2 How many FeCl3 are necessary in reactants?

2

P + Cl2 = P2Cl3 Looking at the reactants, will Cl2 remain the same? If not, what would it be? (this Cl an l not an i)

2Cl2

What is the number in front of reactants or products?

Coefficient

Looking at this equation (as is) what type would it be? Hf+N2= Hf3N4

Combination

A plus B yields AB. This type reaction?

Combustion

Which of these chemical reaction types is "burning" ?

Combustion

I want to know that you watch the lecture and study the notes. What element did the "replacing" in the Single Replacement lecture example. Use Chemical symbol only.

K

Really this idea of "balanced" is all about meeting the ?

Law of Conservation of Matter

I repeated that we are very concerned with "balanced" chemical equations because we want to meet the Law of Conservation of __________.

Matter

So, considering your answer to number 13... what chart did I introduce to you to illustrate this point?

activity series of metals

When LiCl "dissociates" in H2O.. then by our working definition we now have an __________ _____________.

aqueous solution

In the "double displacement " reaction that we examined when we mix aqueous Ag(NO3) and aqueous NaCl we have a literal swapping of which ion?

cation

A and C are referred to in the lecture as?

cations

When compounds separate into "ions" they separate into ____________ and anions.

cations

Mr. Day always harps on "big picture"... so the big picture item here is that we want to recognize the reaction "type" from a ___________ ______________.

chemical equation

H2O doesn't have any numbers written in front of it but if it did have say a "2", this number would be called a ___________________.

coefficient

I think it evident that in lecture the word "synthesis" is used interchangeably with the word ____________.

combination

After listening to Mr. Day's lecture and discussion with you.. you know that we discussed 5 reaction types. BUT 2 are really the same thing... Combination and ______________.

combustion

Looking at this equation (as is) what type would it be? C2H6 + O2 = CO2 + H2O

combustion

This type chemical reaction involves oxygen and gives off heat

combustion

This type reaction involves a single compound but results in multiple products.

decomposition

You realize that in lecture we continuously use the terms replacement and _____________ interchangeably.

displacement

(aq) means aqueous. I tell you in the lecture that Ag(NO3) is aqueous... I also tell you that NaCl is aqueous.. therefore I automatically am telling you that both compounds will _____________ in H2O... Think about what term I would want to hear...

dissociate

Mr. Day prefers the word _____________ to the word "dissolve".

dissociate

So, if you are "insoluble" you will not ______________

dissociate

Which reaction type would involve "2" cations?

double displacement

AB plus CD yields AD + CB. This type reaction?

double replacement

I told you very early on in the lecture that you can have an aqueous solution but that doesn't mean you have a "reaction" taking place... but one of the 5 types of chemical reactions we learned about previously would definitely be an example of a reaction in "aqueous solution"... what type of reaction did I mention? ___________ ______________

double replacement

This type reaction involves a "double swap".

double replacement

Cr + O2 = CrO3 True or False. Cr will now have a 3 in front of it?

false

True or False. A balanced chemical equation would have a higher amount of atoms in the reactants than in the products.

false

In the lecture I gave you ________ rules regarding "How To" balance chemical equations.

five

So, in regard to Chemical reaction types... you are expected to identify __________ types

five

In the lecture I explain that combustion and synthesis are basically same... I discuss one example that was obviously combustion, and another example that obviously is not. The example that isn't is very important to folks with?

high blood pressure

Ca3(PO4)2 is calcium phosphate. In water it is ___________________.

insoluble