Which of the following is true regarding the pH of a solution quizlet?

Which of the following is TRUE regarding the pH of a solution? The fewer hydroxyl ions in a solution, the more basic the solution is. The fewer hydrogen ions in a solution, the more acidic the solution is. The more hydroxyl ions in a solution, the more acidic the solution is.

Is the pH scale a measure of oxygen ion concentration?

The pH scale is a measure of oxygen ion concentration. Basic pH levels are less than 7.

Which statement is true of pH buffers which statement is true of pH buffers?

A buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions when bases are added. Which statement is true of pH buffers? They consist of weak acids and weak bases.

Which of the following statements is true regarding the oxygen atom of a water molecule?

The answer is A. Oxygen is more electronegative than the hydrogen atoms. The high electronegativity of oxygen with respect to hydrogen, the oxygen side of the water molecule has a partially negative charge while the hydrogen sides have a partially positive side.

Which of the following pH values is the most acidic?

The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral—neither acidic or basic.

What pH are acidic substances?

The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, although it’s possible to get a pH below 0 or above 14. Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or basic.

Which of the following statements about water molecule is true?

The correct answer is Water is a nonpolar molecule. Water is a polar molecule: Water is a polar molecule. While the overall charge of the molecule is neutral, the orientation of the two positively charged hydrogens (+1 each) at one end and the negatively charged oxygen (-2) at the other end give it two poles.

Which statement about water molecules is true?

Which statement is true about water molecules? They oxygen atom has a negative charge. How does water relate to the ability of a living thing to generate energy? Without the proper balance of water, chemical reactions in cells could not take place.

Which statement is true about hydrogen bonds and water molecules?

Which statement is true about hydrogen bonds between water molecules? They involve the unequal sharing of a proton between water molecules. The abundance of water in the cells and tissues helps to minimize temperature fluctuations.

Which one of the following is not true for water?

The answer is C. Water is a very good solvent for non-polar molecules.

Do water molecules contain H+ OH ions?

Water undergoes what is known as autoionisation. Water can act as both a Brønsted acid (proton donator) or a Brønsted base (proton acceptor). This leads to the formation of H3O+ ions (known variously as “hydrogen ions”, “hydronium ions” or as I have always referred to them “hydroxonium ions”) and OH− or hydroxide ions.

What are examples of polar molecules?

Examples of Polar Molecules
  • Water (H2O) is a polar molecule. …
  • Ethanol is polar because the oxygen atoms attract electrons because of their higher electronegativity than other atoms in the molecule. …
  • Ammonia (NH3) is polar.
  • Sulfur dioxide (SO2) is polar.
  • Hydrogen sulfide (H2S) is polar.

Which of the following is true about non polar molecules?

A nonpolar molecule has no separation of charge, so no positive or negative poles are formed. In other words, the electrical charges of nonpolar molecules are evenly distributed across the molecule. Nonpolar molecules tend to dissolve well in nonpolar solvents, which are frequently organic solvents.

Which of the following statements about hydrogen is incorrect?

Dihydrogen does not act as a reducing agent. Hydrogen has three isotopes of which tritium is the most common. Hydrogen never acts as cation in ionic salts.

Which of the following is not likely to be soluble in water?

Hydrogen is a gas and not soluble in water. Because a hydrogen molecule is a non-polar compound and water is a polar molecule. We know that ‘like dissolves in like’ . So, hydrogen is not going to soluble in water.

Which is true about polar molecules?

A polar molecule is one with an unequal distribution of electrons in its orbital. To form a solution, the molecules must be the same polarity. In the body, polar molecules are water soluble and non-polar molecules are fat soluble.

Which of the statements is false in the case of polar molecules?

The whole reason that a polar molecule exists is because it does have polar bonds, and it lacks symmetry. Because of that, it makes the whole molecule polar. So this is false.

Which of the following is true about a molecule which contains two polar bonds which have the different degrees of polarity?

When one atom exerts a greater attraction for the bonding electrons than the other atom the covalent bond is ____. … Which of the following is true about a molecule which contains two polar bonds which have different degrees of polarity? it will always be polar. The toxic gas hydrogen cyanide has the formula HCN.

Is it true that a molecule with polar bonds will always be polar?

A polar covalent compound is one in which there is a slight difference in electric charge between opposite sides of the molecule. All polar compounds contain polar bonds. But having polar bonds does not necessarily result in a polar compound. It depends on how the atoms are arranged.

Why are polar molecules hydrophilic?

Hydrophilic Interaction

The nature of polar molecules is that they contain highly electronegative atoms. Consequently, many are capable of hydrogen bonding with aqueous or polar solvents. Because polar molecules are generally water soluble, they are referred to as being hydrophilic, or water-loving.

What are the characteristics of a polar molecule?

A molecule is polar if it has a dipole, where one side of the molecule has a positive charge, and the other side has a negative charge. This results from an uneven distribution of electrons typically from a polar-covalent or ionic bond.

Why are polar bonds polar?

A bond between two or more atoms is polar if the atoms have significantly different electronegativities (>0.4). Polar bonds do not share electrons equally, meaning the negative charge from the electrons is not evenly distributed in the molecule. This causes a dipole moment.

How do you know when bonds are polar?

The terms “polar” and “nonpolar” usually refer to covalent bonds. To determine the polarity of a covalent bond using numerical means, find the difference between the electronegativity of the atoms; if the result is between 0.4 and 1.7, then, generally, the bond is polar covalent.