What happens to the solubility of alkaline earth metals as you go down the group?

The solubility of alkaline earth carbonate and sulfates decrease down the group because the hydration energies decrease.

What happens when an alkali reacts with an acid?

A neutralisation reaction is always:Acid + Alkali —> Salt + WaterHowever, because the question is asking for ions, there is no salt. Acids are H+ ions (this gives them acidic properties) and alkalis are OH- ions (this gives them alkaline properties), and together they react to form water.

What happened to the reaction between each alkali metal and water as you moved down the periodic table?

All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. This shows that the reactivity of the alkali metals increases as you go down Group 1.

Why does the solubility of alkaline earth metal sulphate decreases on moving down the group?

The solubility of the sulphates of alkaline earth metals in water decreases down the group in the periodic table. This is because as we move down the group the hydration enthalpy of the elements increases faster as compared to the relative decrease in their lattice enthalpy.

Why alkaline earth metals are less ionic than alkali metals?

Selina – Chemistry – Class 7 That is because Alkaline earth metals have smaller sizes of cation and more valence electrons. Thus compounds of alkali earth metal are less ionic than alkali metal.

How do alkalis Neutralise acids?

Explain why all alkalis are bases, but not all bases are alkalis. Zinc oxide reacts with hydrochloric acid to form zinc chloride and water. Zinc oxide is insoluble in water. State and explain whether zinc oxide is a base, an alkali, or both.

Why do alkali metals lose electrons easily?

Alkali metals have 1 valence electron on their outer shell. They are more stable when they have 8 valence electrons, so they want to lose that valence electron. They do this by bonding with other elements. When they lose their 1 valence electron, they have a full octet and are therefore stable.

What happens to the reactivity of metals as you go from left to right?

Chemical reactivity of the elements Period – reactivity decreases as you go from left to right across a period. The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity.

How does alkalinity affect the buffering capacity of water?

Waters with low alkalinity are very sensitive to changes in pH; as alkalinity increases the ability of water to resist pH changes grows, enlarging its buffering capacity.

What is the association between alkali and bases?

Alkali metals are characterized by highly basic hydroxides hence the association between alkali and bases. However, only a small fraction of all bases are alkali metals.

What happens to the pH of acid when dissolved in water?

Acid when dissolved in water the H + concentration in moles per litre decreases and therefore pH will increase, as the solution becomes less acidic on dilution. Question 9. How does the pH of the solution change when a solution of the base is diluted?

What is the effect of cation exchange on alkalinity?

Cation Exchange. Cation exchange can increase alkalinity whenever hydrogen ions in solution exchange on surfaces for base cations. The effect is generally reversible, and thus the process may not contribute to long-term increases in alkalinity once the cation exchange sites are depleted.