Acids and Bases Trivia

1. What is an Arrhenius Acid?

From Quiz High School Acids & Bases

Answer: A substance which releases hydrogen ions in water

All Arrhenius Acids start with an H and are ionic substances. Common examples include HCl (hydrogen chloride) and HBr (hydrogen bromide).

From Quiz The Truth About Indicators

Answer: Red

Acids are common in our lives: orange juice, sodas, and a lot of things we drink contain acids. But stronger acids can be dangerous, burning skin and corroding metal.

From Quiz Acids and Bases

Answer: Yellow

Methyl orange is one of the indicators commonly used in titrations. In an alkaline solution, methyl orange is yellow. In a solution becoming less acidic, methyl orange moves from red to orange and finally to yellow with the reverse occurring for a solution increasing in acidity. It should be noted that the entire color change occurs in acidic conditions.

From Quiz Concepts of Acids and Bases

Answer: SO4 ^(2-)

The conjugate base of a Brønsted-Lowry acid is simply a proton deducted from the acid. Vice versa, the conjugate acid of a Brønsted-Lowry base is a proton added to the acid. Eg:- H3O ^ (+) is the conjugate acid of H2O.

From Quiz Acids and Bases

Answer: Universal indicator gives the pH of the solution.

Universal indicator gives a range of colours that can be used to determine the pH of a solution. Litmus can only tell you whether something is acid alkali or neutral.

From Quiz The World of Acidity!

Answer: Red

Blue litmus paper turns red on dipping into acids whereas red litmus paper remains red. Orange juice contains citric acid and hence it is acidic. Acids are generally sour to taste. But don' t try to taste ones like hydrochloric acid. Now you know why your orange tastes sour!

From Quiz Concepts of Acids and Bases

Answer: Amphiprotic

Water being considered an acid or a base instead of being a neutral substance may sound strange, but we are using Brønsted-Lowry theory here. Accordingly we classify acids and bases upon the transfer of protons (hydrogen ions). An example of water acting as a Brønsted-Lowry acid would be:- NH3 + H2O ⇄ NH4^(+) + OH^(-) An example of water acting as a Brønsted-Lowry base would be:- HCl + H2O ⇄ Cl^(-) + H3O^(+)

From Quiz Operation Acid Gambit

Answer: sour

Acids are sour. Fruits like grapefruits, lemons and oranges contain citric acid in their juice. It is the citric acid that makes lemons and grapefruits so sour.

From Quiz High School Acids & Bases

Answer: 7

Water is a neutral substance with an equal proportion of hydrogen and hydroxide ions in solution. At different temperatures the pH of water can vary, but it will always remain neutral.

From Quiz The World of Acidity!

Answer: Bitter

Bases are bitter to taste and soapy to touch. This can be seen with soap water. Better not to taste a base!

From Quiz Acids, Bases and You!

Answer: carbonic acid

Carbonic acid(H2CO3) decomposes to form bubbles of carbon dioxide(CO2).

From Quiz Concepts of Acids and Bases II

Answer: Forward

Notice that it is not mentioned that the given concentrations are at equilibrium. In order to determine whether or not they are at equilibrium, we need to find the concentration/reaction quotient, which is the product of the concentrations of the products divided by that of the reactants, to the power of their respective reaction coefficients. If the concentration quotient is the same as the value of the equilibrium constant, then the reaction is at equilibrium and so, the net reaction will not proceed anywhere. Upon calculation, it is found out that the concentration quotient is just ([Z]^2/[X]*[Y]= 2^2/1*1=) 4. Since the value is less than the equilibrium constant, the concentration of products needs to increase, i.e. the net reaction shifts forward. You can also calculate the final concentrations using the ICE*, or Initial-Change-Equilibrium method:- Our initial concentrations are given in the question - the respective concentrations of X,Y and Z are 1, 1 and 2 molars respectively. Let the concentration of moles of X or Y reacted be 'n'. Then the concentration moles of Z added would be 2n. The equilibrium concentrations of X,Y and Z would be (1-n), (1-n) and (2+2n) respectively. The equilibrium expression would be :- Kc = (Concentration of Z)^2 / [ (1-n)*(1-n) ] 5 = (2+2n)^2 / [ (1-n)*(1-n)] You will get a quadratic equation. Quadratic equations give two values for n, pick the value that is consistent. (Hint : If you pick the greater value of n, (1-n) would be negative, which isn't possible.) You will get approximately n=0.06, and the equilibrium concentrations of X, Y and Z would be 0.94, 0.94 and 2.12 molars respectively. *This isn't an official term, but simply a memory mnemonic to help you remember the steps.

From Quiz Concepts of Acids and Bases

Answer: 14.00

1 * 10^-14 is the value of the ionization constant of water at STP - and the amount of hydrogen or hydroxide ions produced are the inverses of each other. The pH and pOH values are indefinite, but their sum is not.

From Quiz High School Acids & Bases

Answer: 14 & fourteen

When the pH is known you can subtract it from fourteen to find the pOH. This information can be used to calculate concentration of ions.

From Quiz Acids and Bases

Answer: Red

Strong acids turn universal indicator red. Weaker ones may turn it orange or yellow.

From Quiz Concepts of Acids and Bases II

Answer: 1%

If the pKa is 6.0, then the value of Ka (or the acid disassociation constant) is the negative log of 6.0, or 10^-6. Given the assumption, and following Ostwald's theory of dilution, the amount of concentration times the degree of disassociation squared equals the acid disassociation constant. If you plug in the values given the question, the degree of disassociation will be found to be 0.01. Note that a percentage was requested in the question, in which case you will have to multiply this value by 100%. The assumption given simply makes our calculations easier, otherwise we may have to solve quadratic equations with exponentially small numbers. Given that the disassociation is just 1%, that was a fair assumption. Generally, it is recommended to perform the calculation without the assumption if the value exceeds 5%.

From Quiz Operation Acid Gambit

Answer: citric acid

Citrus fruits contain citric acid. This acid is grouped among the weak acids. It is used as a preservative/conservative for foods and may be used to add a tang or sour taste to some foods and juices. It can also be used in detergents and cosmetics.

From Quiz High School Acids & Bases

Answer: A substance that acts both as an acid and a base

An amphiprotic substance can either donate a proton, or accept a proton. This ability allows it to be defined both as an acid and a base.

From Quiz The Truth About Indicators

Answer: Red

You can buy goldenrod paper as full sheets at certain office stores. You can then mix baking soda and water and draw on the paper with cotton swabs dipped in the mixture.

From Quiz Acids and Bases

Answer: Hydrogen

If you react a metal with an acid the gas given off is always hydrogen.

From Quiz The World of Acidity!

Answer: Neutral

Though naturally occurring water is usually slightly basic (about 7.2 on the pH scale) due to dissolved minerals, pure water is (by definition) neutral.

From Quiz Acids, Bases and You!

Answer: ascorbic

Deficiency of Vitamin C can often lead to a disease called scurvy.

From Quiz High School Acids & Bases

Answer: becomes fully ionized

A strong base will become 100% ionized in solution, and a strong acid will fully dissociated in solution. Weak acids and bases set up an equilibrium where they don't fully dissociate.

From Quiz Acids, Bases and You!

Answer: ammonia

In water it forms ammonium hydroxide (NH4OH) which is highly basic. It is commercially produced by the Habers Process.

From Quiz Concepts of Acids and Bases

Answer: 16

The pH of the strong acid = -log (Concentration of Hydrogen ion) [base of log is 10] = -log 10 = -1 The pOH of the strong base would similarly be -1. Remember that pH + pOH of same substance at STP = 14 Then pH of the base = 14 - pOH = 14 - (-1) = 15 The difference is thus 15 - (-1) = 16 As we can see, the pH of an acid can go below 0 and that of a base can go above 14.

From Quiz Operation Acid Gambit

Answer: Cyanic Acid

This acid is also called isocyanic acid. It is a liquid acid which is unstable and poisonous. This highly volatile acid is used in the preparation of cyanides and it also produces carbon dioxide and ammonia when it hydrolyzes in water.

From Quiz High School Acids & Bases

Answer: less than 7

Although the majority of substances will have a pH that falls between 0 and 14, there are some that fall outside of this range. Acidic substances are less than 7 and neutral substances have a pH of 7, while basic substances have a pH greater than 7.

From Quiz The Truth About Indicators

Answer: Green

While we say water is neutral, it is actually slightly basic, with a pH of 7.2.

From Quiz Acids and Bases

Answer: Sodium nitrate + water

Nitric acid + sodium hydroxide ----> sodium nitrate + water.

From Quiz Acids, Bases and You!

Answer: sulphuric acid

Sulphuric acid is a strong mineral acid and highly corrosive.

This is category 6848
Last Updated Nov 23 2024 5:46 AM

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