Acids, Bases, and Salts Quiz

Acids have a ______ taste.

Acids turn blue litmus paper ______.

Bases turn red litmus paper ______.

[Blank] is a natural indicator extracted from lichen.

When soap is scrubbed on a curry stain, it turns ______-brown due to its basic nature.

[Blank] orange is a synthetic indicator used to test for acids and bases.

[Blank] is another synthetic indicator used to test for acids and bases.

Acids and bases ______ each other's effects.

A purple dye extracted from lichen is called ______ solution.

When a curry stain on a white cloth is scrubbed with soap, it turns reddish-brown due to the ______ nature of soap.

The ability of acids and bases to counteract each other's effects demonstrates the process of ______.

[Blank] is a natural indicator extracted from lichen that is commonly used to test for acids and bases.

Substances that are ______ in taste and turn blue litmus paper red are classified as acids.

Methyl orange and phenolphthalein are examples of ______ indicators used to distinguish between acids and bases.

A solution that is neither acidic nor basic will have a ______ litmus solution colour.

If someone overeats and suffers from acidity, a ______ solution can be used as a remedy due to its ability to neutralize the acid.

Bases typically have a ______ taste and turn red litmus paper blue.

Turmeric, red cabbage leaves, and coloured petals of flowers are examples of ______ indicators.

Litmus is extracted from ______, a plant belonging to the division Thallophyta.

When litmus solution is neither acidic nor basic, its color is ______.

The ability of acids and bases to ______ each other’s effect is used when choosing a remedy for acidity after overeating.

Litmus is a ______ indicator, meaning it is derived from natural sources.

Acids are known to change the colour of blue litmus to ______.

Bases are known to change the colour of red litmus to ______.

Curry stains on white clothes turn reddish-brown when scrubbed with ______, due to its basic nature.

[Blank] indicators, like methyl orange and phenolphthalein, are used to test for acids and bases.

Litmus solution is extracted from ______, a plant belonging to the division Thallophyta.

[Blank] in food are responsible for sour tastes.

In the context of acid-base neutralization, the equilibrium constant for the self-ionization of water, often denoted as ______, plays a crucial role in determining the pH of a neutral solution at varying temperatures, reflecting the temperature dependence of proton and hydroxide ion concentrations.

Consider a scenario where a weak acid, such as acetic acid ($CH_3COOH$), is titrated with a strong base, like sodium hydroxide ($NaOH$). The pH at the equivalence point will be ______ 7 due to the formation of the conjugate base ($CH_3COO^−$) which undergoes hydrolysis, increasing the hydroxide ion concentration.

Given the Henderson-Hasselbalch equation, $pH = pK_a + log([A^-]/[HA])$, if the concentration of the conjugate base ($A^−$) is exactly equal to the concentration of the weak acid ($HA$), the pH of the solution will be equal to the ______ of the weak acid, effectively buffering the solution against drastic pH changes.

When assessing the performance of a mixed indicator in titrations, the optimal indicator should exhibit a sharp color change within a narrow pH range, ideally where the ______ derivative of the titration curve is maximized, ensuring precise endpoint determination.

In the context of non-aqueous titrations, particularly when titrating weak bases with perchloric acid in glacial acetic acid, the use of ______ indicators becomes essential due to the leveling effect of water, which diminishes the differentiation of base strengths.

Consider diprotic acids like sulfuric acid ($H_2SO_4$). The first ionization is typically strong, but the second ionization to form $SO_4^{2-}$ exhibits a weaker acidic behavior. Therefore, the ______ principle predicts that adding a common ion, such as $HSO_4^-$, will suppress the second ionization even further.

In the context of complexometric titrations using EDTA, the stability of the metal-EDTA complex is highly pH-dependent. To ensure accurate results particularly with metals forming weaker complexes, titrations are often carried out at ______ pH values, utilizing appropriate buffering systems to maintain a stable and optimal condition.

When dealing with polyprotic acids, like phosphoric acid ($H_3PO_4$), the successive dissociation constants ($K_{a1}$, $K_{a2}$, $K_{a3}$) decrease significantly. The pH calculation of a solution containing only the acid often primarily depends on ______, as the contributions from subsequent dissociations are negligible due to their much smaller magnitudes.

In scenarios involving sparingly soluble salts, the presence of a common ion can significantly reduce the salt's solubility. For instance, adding sodium chloride ($NaCl$) to a saturated solution of silver chloride ($AgCl$) decreases the concentration of $Ag^+$ ions due to the ______ effect, shifting the equilibrium towards the precipitation of more $AgCl$.

Considering the behavior of amphoteric substances such as amino acids, at the isoelectric point (pI), the amino acid exists predominantly as a ______, carrying both a positive and negative charge, resulting in minimal net charge and reduced electrophoretic mobility.

Acids taste ______ and turn blue litmus paper red.

Bases typically taste ______ and have a slippery feel.

[Blank] is a natural indicator extracted from lichens, commonly used to test for acidity or alkalinity.

When an acid and a base react, they ______ each other's effects, a process known as neutralization.

Turmeric, a common household spice, acts as a natural ______, turning reddish-brown in the presence of a base.

Solutions that are neither acidic nor basic are considered ______, having a pH of 7.

The reddish-brown stain of curry on a white cloth, when scrubbed with soap, which is basic in nature, turns ______ again when the cloth is washed with plenty of water.

[Blank] indicators, such as methyl orange and phenolphthalein, are man-made substances used to determine the pH of a solution.

The division Thallophyta includes plants like ______, from which litmus is extracted.

The subtle interplay between hydronium ($H_3O^+$) and hydroxide ($OH^−$) ion concentrations dictates the ______ which fundamentally governs chemical behavior across diverse aqueous systems.

Bases taste ______ and turn red litmus paper blue.

When soap, which is basic, is scrubbed on a curry stain, it turns ______.

Methyl orange and phenolphthalein are examples of ______ indicators used to test for acids and bases.

The ability of acids and bases to ______ each other’s effect is key to understanding neutralization reactions.

Red cabbage leaves and colored petals of flowers like Hydrangea can act as acid-______ indicators.

Litmus solution's color is ______ when it is neither acidic nor basic.

The division Thallophyta encompasses plants like ______, from which litmus is extracted.

The nuanced color transition observed with indicators such as phenolphthalein hinges on intricate molecular structural transformations induced by protonation or ______ events, thereby modulating the compound's light absorption properties.