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Flashcards in Chemistry Deck (62)
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1

What type of equation is this;
NaCl+AgNO3-MgCl2+H2

Double

2

What type of equation is this;
Cl2+NaBr-NaCl+Br2

single replacement

3

What type of equation is this;
H+N-HN

Synthesis

4

What is a chemical change?

a change on which a reaction between the atoms or molecules must take place

5

Heat causes an object to __________

expand

6

SKIP List the labels of the periodic table, left to right.

alkali metals
alkaline earth metals
transition
boron family
carbon
nitrogen
oxygen
halogens
noble gasses
lanthanoid
actinoid

7

What type of equation is this;
HgO-Hg+O

decomposition

8

define exothermic

exothermic is a type of evidence, in the category heat given off or removed, and is characterized by heat being given off.

9

define endothermic

endothermic is a type of evidence, in the category heat given off or removed, and is characterized by heat being removed

10

list the different types of evidence for chemical reactions

-heat given off or removed
-precipitate
-color change
-gas production
-new substance with different properties

11

are the following chemical or physical changes:
1.zinc is added to vinegar
2. wooden splint is broken in half
3. benedicts solution is added to corn syrup and heated
4. seltzer tablet is crushed
5. crushed seltzer is added to water
6. hydrochloric acid, baking soda, and phenolphthalein are mixed
7. new substance appears
8. digesting a candy bar
9. dissolving cool-aid in water
10. dew on grass in the morning
11. chemical reaction occurs and something bubbles
12. substance changes state or phase

1. chemical
2. physical
3. chemical
4. physical
5. chemical
6. chemical
7. chemical
8. chemical
9. physical
10. physical
11. chemical
12. physical

12

is the carbon cycle a chemical or physical change?

chemical, (photosynthesis and respiration are chemical changes because CO^2 is broken down to make sugar during photosynthesis and during respiration it is released)

13

define chemical change?

the product is noticeable/visually modified product *no new substance is formed*

14

define physical change?

a new substance is formed and can not be reversed

15

define the law of conservation of matter

no matter how many reactants and products in a chemical reaction, all of atoms present at beginning of the reaction will remain at the end, meaning the total mass stays the same. matter is neither created nor destroyed.

16

give definition, properties, and examples about mixtures

definition: two or more substances that are together in the same place but not chemically combined.
properties: each substance keeps individual properties
examples: soil, ocean water, drink mix,

17

define homogenous

well mixed, can't see different parts. often called a solution - a solution is the best mixed of all possible mixtures
examples: pure and salt water, iron, hydrogen

18

define heterogenous

can see separate parts, not completely mixed.
examples: salad, trail mix, a pencil

19

compound or mixture:
1.air
2.powdered drink mix
3.paper
4.sugar
5.carbon dioxide
6.calcium carbonate

1. mixture
2. mixture
3. mixture
4. compound
5. compound
6. compound

20

you can separate mixtures by using...

magnetism, hand seperation, filtration, sifting, extraction and evaporation, chromatography

21

what does the indicator of red litmus do?

red litmus and basic substances turn the paper blue

22

what does the indicator of blue litmus do?

blue litmus and acidic substances turn paper red

23

what does the indicator of bromthymol do?

acid: orange
neutral: blue
base: dark blue

24

what does the indicator of phenolphthalein do?

acid: nothing
neutral: pink
base: dark pink

25

what do acids and bases taste like?

acids: sour
bases: bitter

26

how do acids and bases react with the metals magnesium, zinc, and iron?

acids: produce hydrogen gas
bases: doesn't

27

how does it react with carbonates?

acids: a gas forms
bases: doesn't

28

what is an indicator?

helps to determine substances such as litmus

29

do acids conduct electricity?

- react with metals and conduct electricity

30

bases are slippery.

i hope you knew that.