Warm up 9/23 & Lab Turn in*Identify the following symbols & identify

whether they are Elements (E) or Compounds (C).

N H2O Na K

H2SO4

HCl Cl NaCl

2:001:591:581:571:561:551:541:531:521:511:501:491:481:471:461:451:441:431:421:411:401:391:381:371:361:351:341:331:321:311:301:291:281:271:261:251:241:231:221:211:201:191:181:171:161:151:141:131:121:111:101:091:081:071:061:051:041:031:021:011:000:590:580:570:560:550:540:530:520:510:500:490:480:470:460:450:440:430:420:410:400:390:380:370:360:350:340:330:320:310:300:290:280:270:260:250:240:230:220:210:200:190:180:170:160:150:140:130:120:110:100:090:080:070:060:050:040:030:020:01End

Write the equation: H2O+ H+ H3O + What are the products and what are the reactants?

*Staple pages 3-6 + 2 sheets of graph paper and put in basket in the front of the classroom.

Chemistry cont.Chemical Reactions

(rxn)EX. NaOH + HCl NaCl + H2O

reactants: left side

products: right side

Exergonic/exothermic: release energy like heat, explosion, light etc. – feels warm

endergonic/endothermic: requires energy to occur and takes it from the environment- feel cold

Activation Energyenergy needed to start a rxn

NEED TO MEMORIZE THE FOLLOWING ELEMENTS AND

COMPOUNDS FOR YOUR QUIZ AND TEST!

ELEMENTS

H: hydrogen

O: oxygen

N: nitrogen

C: carbon

Na: sodium

Cl: chlorine

K: potassium

S: sulfur

COMPOUNDSH2O: waterNaCl: sodium chloride/saltH2SO4: sulfuric acidHCl: hydrochloric acidNaOH: sodium hydroxideCO2: carbon dioxideO2: oxygen gas

ACIDS, BASES, AND pH

pp. 39-44

WaterPolar (covalent) compound

Water has a positive (+) and negative (-) “pole”

(+) is due to H and (-) is O

• acts like a magnet with + attracted to –

• pulls apart molecules like NaCl (ionic bond)

WaterBonding

covalent bonds hold H2O together

hydrogen bonds hold molecules of H2O

Covalent > Hydrogen

Acids and Bases

H2O = water

H+ = hydrogen ion

OH- = hydroxide ion

Acids and Bases H2O H+ + OH-

H+ reacts with H2O

H2O + H+ H3O+ (hydronium)

H3O+ more commonly written as H+

Warm up 9-25

Define the following terms

H2SO4

CO2

K

S

H3O+

Describe 2 properties of water’s bonding.

Name 3 properties of an acid?

Acids

Acids: H+ > OH-

pH less than 7

Acid Properties: tastes sour, highly corrosive

EX. HCl, H2SO4

Bases

Bases: OH- > H+

pH more than 7

Base Properties: tastes bitter, feel slimy, caustic

EX. NaOH, Mg(OH)2

pH power of Hydronium

measures acidity (from 0-14) and how much H3O+/H+ is present. The closer to 0, the more the H3O +/H+

0 up to 7 = acid

7 = neutral

over 7 = base/alkaline

Can use indicators to tell the pH ( phenol red, pH paper, litmus, BTB)

InterventionThursday:10/3 @ 2:40 pm

Friday: 10/4 @ 6:50 am

This year biology is offering intervention to insure success for all students.

Before each exam students will have the opportunity to attend a targeted study review session. To be credited with intervention students must attend one 45

min intervention session and complete all corresponding work.

Students will have two opportunities to complete intervention.

Intervention will be offered once before school and once after school the week of the exams. Specific Dates will be posted on teacher website.

Completion of intervention will earn students a 5% test score increase to a maximum of 75% on the test.

At any time during the semester if student’s class average falls below 70% he or she is expected to attend intervention until grade improves.

RAFT Project

Role, Audience, Format, Topic

Due Friday Oct. 4th at the beginning of class. Worth a lot of points