Take out your write up and open your books to page A-26.HW: None

Safety Review

Do Now for 9/24/13

A7 Identifying Solids

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

(safety review video) Introduce A7 Lab Safety Gather data for the solids that

were found in our mixture.Clean up

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

What were the two liquids we identified from our unknown mixture? Mineral oil Iron Nitrate

Do we consider the unknown mixture to be hazardous? Yes

Why? Iron nitrate is toxic (poisonous)and

corrosive (burns)

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

Black squares/rectangles

Large cylinders

Small cylinders

Red tubes

Today’s Target: To accurately collect data about the properties of 4 unknown solids. Use the tests on page A-29 to gather data

about the 4 types of solids: 4 Tests:

Conductivity – Ability to transmit electricity.▪ Light bulb illuminates = conducts electricity.

Density relative to water – Float or sink in water.▪ Floats = less dense, sinks = more dense.

Density relative to ethanol – Float or sink in ethanol.▪ Floats = less dense, sinks = more dense.

Reacts with copper chloride – Evidence of a chemical reaction.▪ Evidence of a reaction = color change, bubbling,

cloudiness, temperature change, formation of a precipitate (solid forms in the presence of a chemical reaction)

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

Lab Safety and technique Goggles and aprons. Do NOT handle the solids with your

hands – use the forceps. Clean the solids with soap, water, and

steel wool prior to testing. Lab Progress (Red, Yellow, Green)

Red card = Just starting, lots to do. Yellow card = Half way done. Green card = Data gathered. Station

cleaned up.

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

Clean up Wash and dry each sample. Wash your hands when complete. Share your data with your partners. NO ONE MAY REMOVE THEIR SAFETY

EQUIPMENT UNTIL I HAVE CLEARED THEIR STATION.

Today’s Target: To accurately collect data about the properties of 4 unknown solids.

Take out a 3x5 card and put your name, today’s date, and this period in the upper right hand corner.

Answer the following question: If your lab group had:

a red card: What caused you to get so far behind, and what can you do to prevent it from happening again?

a yellow card: How many unknown solids do you have left to gather data on, and what was your most challenging part of gathering data?

a green card: What was your secret for successfully gathering all the data?

DUE AT THE END OF THE PERIOD!!!

Take out A7 write upHW: Complete analysis 1 through 3Expanded answer for #1Classifying Matter Song

Do Now for 9/25/13

A7 Identifying Solids

Today’s Target: To use evidence to properly identify the solids that were contained in our unknown mixture.

Lab Safety Gather data for remaining solidsClean upReview dataAnalysis 1 through 3

A7 identifying Solids Use the tests on page A-29 to gather data

about the 4 types of solids: 4 Tests:

Conductivity – Ability to transmit electricity.▪ Light bulb illuminates = conducts electricity.

Density relative to water – Float or sink in water.▪ Floats = less dense, sinks = more dense.

Density relative to ethanol – Float or sink in ethanol.▪ Floats = less dense, sinks = more dense.

Reacts with copper chloride – Evidence of a chemical reaction.▪ Evidence of a reaction = color change, bubbling,

cloudiness, temperature change, formation of a precipitate (solid forms in the presence of a chemical reaction)

A7 Identifying Solids

Lab Safety and technique Goggles and aprons. Do NOT handle the solids with your

hands – use the forceps. Clean the solids with soap, water,

and steel wool prior to testing. Wash your hands when complete. Share your data with your partners.

A7 Identifying Solids

Analysis#1 What is the:

Red tube – Black Square – Small Cylinder - Large Cylinder -

#2 Were you able to identify what material each solid was made of? Explain

A7 Identifying Solids

Data: Properties of separated solidsTest Red

TubeBlack Square

Small Cylinder

Large Cylinder

Electrical Conductivity

Density relative to water

Density relative to ethanol

Reacts with copper chloride

A7 Identifying Solids

Data: Properties of separated solidsTest Red

TubeBlack Square

Small Cylinder

Large Cylinder

Electrical Conductivity

No No Yes Yes

Density relative to water

Floats Floats Sinks Sinks

Density relative to ethanol

Sinks Sinks Sinks Sinks

Reacts with copper chloride

None None Reacts Reacts

A7 Identifying Solids

Analysis#1 What is the:

Red tube – Black Square – Small Cylinder - Large Cylinder -

#2 Were you able to identify what material each solid was made of? Explain

A7 Identifying Solids

#3 Which tests identified physical properties? Chemical properties?

Exit Ticket

Take out a 3x5 card and put your name, today’s date, and this period in the upper right hand corner.

Answer the following question on your card:

What Characteristic do you think was the best to use to identify the unknown solids? Why?

DUE AT THE END OF THE PERIOD!!!

Do Now for 9/26/13

Take out something to write with.

HW: A7 #1 is due tomorrowA7# 5 is worth a test grade and

is due Tuesday.

A7 Identifying Solids

Today’s Target: To write a better analysis answer for A6#1 Return work: Volume song

Go over A6#1Key Points and Vocabulary for

A7A7 #1 RubricA7 #5 Rubric#1 is due tomorrow#5 is due Tuesday

A7 Identifying Solids

Key Concepts: Write these down and give an example from the previous activities where this is shown. Substances have characteristic properties

such as density, that are independent of the amount of the sample.▪ Ex.

Scientists use appropriate tools and techniques to gather, analyze, and interpret data.▪ Ex.

Scientific explanations emphasize evidence.▪ Ex.

A7 Identifying Solids

Vocabulary Evidence-A1 1. Conductivity: A measure of the tendency of an

object to support the flow of heat or electricity. 2. Density: The relationship between the mass and

volume of a substance. The mass per unit volume, specifically grams per cubic centimeter, or grams per milliliter. Density equals mass divided by volume (d = m/v).

3. Reactive (reactivity): Substances capable of causing an explosion or providing heat or oxygen (oxidizers) that might cause a fire, or can emit toxic fumes when mixed

with other substances.

Test for A6, A7

Your task (#5 on page A-30): Write a letter to the state’s Hazmat Training Center explaining the safety procedures you followed while identifying the solids and liquids in activities A5, A6, and A7.

Your letter must include: All the safety steps taken in the process. Why each safety step was necessary.

Your letter will be graded based on: The number and accuracy of the steps listed. The clarity of the explanation of the reason for each step. Technical aspects:

▪ Spelling▪ Proper format▪ Neatness▪ Grammar▪ Etc.

PROJECT DUE ON Tuesday October 2nd .

Exit Ticket

Take out a 3x5 card and put your name, today’s date, and this period in the upper right hand corner.

Answer the following question on your card:

How are you going to improve your answer for A6 #1?

DUE AT THE END OF THE PERIOD!!!