Elements, Compounds and Mixtures
Odd One Out:
Salt, Carbon Dioxide, Glucose (Sugar), Sodium
Sodium
Find the elements GROUP and PERIOD.
Hydrogen
Group 1 Period 1
What is cohesion in water?
Water's ability to stick to itself.
What is the range of an acid's pH balance?
0-6
What ever I start with, I have to
Odd One Out:
Trail Mix, Salt Water, Tea, Muddy Water
Trail Mix
Find the elements GROUP and PERIOD.
Oxygen
Group 16 and Period 2
What is adhesion?
Water's ability to stick to other surfaces and materials?
What is the range of pH for bases?
8-14
In the reaction between hydrogen (H2) and oxygen (O2) to form water (H2O), 4 g of hydrogen reacts with 32 g of oxygen.
2H2 + O2 → 2H2O
How much water is produced in this reaction?
36g
Odd One Out:
Hydrogen, Carbon, Helium, Pizza
Pizza
Find the element's GROUP and PERIOD.
Tin
Group 14 and Period 5
Which phenomenon does not occur due to adhesion?
A. Water droplets forming on a waterproof jacket.
B. A puddle of water evaporating at a slower rate.
C. Dew forming on a leaf in the early morning.
D. A wet, plastic tablecloth sticking to a table.
B. A puddle of water evaporating at a slower rate.
Which of the following sets of properties describes a base?
A. pH less than 7, bitter taste, slippery texture, corrodes organic material,
B. pH greater than 7, sour taste, corrodes metal
C. pH greater than 7, bitter taste, corrodes organic material, slippery to touch, turns red litmus paper blue
D. pH less than 7, sour taste, corrodes metal, can burn if touched, turns red litmus paper blue
C. pH greater than 7, bitter taste, corrodes organic material, slippery to touch, turns red litmus paper blue
Sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to form water (H2O) and sodium sulfate (Na2SO4).
H2SO4 + 2NaOH → 2H2O + Na2SO4
Sulfuric Acid 96g
Sodium Hydroxide 80g
Water ?
Sodium Sulfate 142g
34g
Odd One Out:
Can be physically separated
Only one type of particle
Parts are not chemically combined
Parts keep individual properties
Parts keep individual properties
Find the elements GROUP and PERIOD.
Iron
Group 8 Period 4
What is the property that was the cause of the observed effect using the terms below.
You drop a bay leaf into a pot of hot chicken stock. The leaf lands flat on the surface and floats like a raft.
Surface Tension
Which of the following sets of properties describes an acid?
A. pH less than 7, sour taste, turns litmus paper red
B. pH greater than 7, bitter taste, turns litmus paper blue
C. pH less than 7, bitter taste, slippery texture
D. pH greater than 7, sour taste, turns litmus paper blue
A. pH less than 7, sour taste, turns litmus paper red
In the reaction 4Fe+3O2→2Fe2O3, what happens to the mass of the reactants compared to the mass of the products?
A. The mass of the products is greater.
B. The mass of the products is less.
C. The mass of the reactants and products are the same.
D. The mass of the reactants and products cannot be compared.
C. The mass of the reactants and products are the same.
A student prepares a solution by mixing salt and water. After stirring, the salt completely dissolves, and the mixture looks the same throughout. How should this mixture be classified?
Homogeneous Mixture
Identify the element, group, period and whether the element is a metal or nonmetal in the following:
4Fe + 3O2 + 6H2O --> 4Fe(OH)3
Fe 8/4/M
O 16/2/NM
H 1/1/NM
How do cohesion and adhesion work together to help water move up through a plant?
Cohesion keeps water molecules together, while adhesion helps them stick to plant vessels. Together, they enable water to travel up through the plant against gravity.
A solution with a pH of 3 is mixed with another solution. The result is a solution with a pH of 7.
Describe what you can infer about the pH of the unknown solution.
The acid was neutralized by mixing it with the unknown solution, so the unknown solution must be a base. Therefore, the solution must have a pH that is greater than 7.
In the reaction Na2CO3+2HCl→2NaCl+H2O+CO2, if the total mass of reactants is 105 grams, what should the total mass of the products be?
A. 105 grams
B. 210 grams
C. 52.5 grams
D. 100 grams
A. 105 grams