Unit 1- water and intro to chem Flashcards

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1
Q

Acid

A

Compound that donates hydrogens to solutions. pH level is lower than 7

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2
Q

Adhesion and how it affects life

A

Clinging of one substance to another- adhesion to the cell walls of a plant help counter the effects of gravity

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3
Q

Base

A

Compound that accepts H ions and removes them from the solution. pH is higher than 7

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4
Q

Non-polar covalent bonds

A

Molecules with an equal charge throughout. Symmetrical.

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5
Q

Cohesion and their effects of life

A

The tendency of molecules to stick together- trees depend on cohesion to help transport water and nutrients up the tree’s roots.

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6
Q

What is the pH scale

A

Measures acidity and basicity

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7
Q

Covalent Bond

A

Two atoms “hooking up”. They share an electron to become stable.

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8
Q

Polar covalent bond

A

Two+ atoms with opposite charges creating a covalent bond is a polar covalent bond. They are not symmetrical

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9
Q

Polar Molecule

A

Not symmetrical. Has disproportionate charges throughout

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10
Q

hydrogen bond

A

Weak and mostly temporary links between a molecule with hydrogen and another atom and/or molecule with an opposite charge. Can create bonds when the other substance is polar.

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11
Q

Solution

A

Homogeneous mixture with 1+ solvent distributed through a solute easily. An example would be salt (solute) in water(solvent).

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12
Q

Ionic Bond

A

One or more atoms give up/take an electron to become stable.

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