Acids, Bases and Salts Science - Acids, Bases and Salts

Adding water to acid is an …………………. reaction.

HCl + NaOH → NaCl + H2O is a …………………. reaction.

pH of strong acid is ………………… .

An ionic compound NaCl is formed by ………………… .

The solution turns blue litmus red, its pH is likely to be ………………… .

Sodium chloride, potassium hydroxide, acetic acid, sodium acetate.

Crystalline blue vitriol, crystalline common salt, crystalline ferrous sulphate, crystalline sodium carbonate.

Calcium oxide, magnesium oxide, zinc oxide, sodium oxide.

Sodium nitrate, sodium carbonate, sodium sulphate, sodium chloride

Ammonium chloride, sodium chloride, potassium nitrate, sodium sulphate

Name the two units to express the concentration of the solution.

Name any two bases with their acidity 3 (triacidic)

Name any two bases with their acidity 2 (diacidic)

Name any two bases with their acidity 1 (monoacidic)

Name any two acids with their basicity 3 (tribasic)

Dilute HCl was poured on baking soda.

Carbon dioxide gas was passed through KOH solution.

Dilute nitric acid was added to calcium oxide.

NaOH solution was added to HCl solution.

the Negative electrode and the positive electrode.

 Cation and anion

Acids and bases

Complete the following table.

Bicarbonate salt of metal + dilute acid → Another salt of metal + carbon dioxide + water

Carbonate salt of metal + dilute acid → Another salt of metal + Carbon dioxide + water

Oxide of non-metal + base → salt + water

Metal oxide + Dilute acid → SaIt + Water

Show the dissociation of the following compounds on dissolving in water, with the help of chemical equation and write whether the proportion of dissociation is small or large.

Hydrochloric acid, Sodium chloride, Potassium hydroxide, Ammonia, Acetic acid, Magnesium chloride, Copper sulphate.

:Fit a bent tube in a rubber cork. Take some lime water in a test tube and keep it handy. Take some baking soda in another test tube and add some lemon juice to it. Immediately fit the bent tube over it. Insert its other end into the lime water. Note down your observations of both the test tubes. Repeat the procedure using washing soda, vinegar and dilute HC1 properly. What do you see?

:Take some water in a test tube and add a little red oxide (the primer used before painting iron articles) to it. Now add a small quantity of dilute HCl to it, shake the test tube and observe.(a) Does the red oxide dissolve in water?(b) What change takes place in the particles of red oxide on adding dilute HCl?

:Take a big test tube. Choose a rubber stopper in which a gas tube can be fitted. Take a few pieces of magnesium ribbon in the test tube and add some dilute HCl to it. Take a lighted candle near the end of the gas tube and observe. What did you observe?

How are the following substances classified into three groups with the help of litmus?
Lemon, tamarind, baking soda, buttermilk, vinegar, orange, milk, lime, tomato, milk of magnesia, water, alum.

(i) With which solutions did the bulb glow?
(ii) Which solutions are electrical conductors?

Obtain a sample of rainwater. Add to it a few drops of universal indicator. Meausre its pH. Describe the nature of the sample of rainwater and explain the effect if it has on the living world.

What would be the definition of an acid and a base with reference to the neutralization reaction?

On mixing the substances as shown here, what are the resulting mixtures formed by mixing the following substances called?
(a) Water and salt
(b) Water and sugar
(c) Water and sand
(d) Water and sawdust

\text { Dilute } H _2 SO _4 \text { was taken in an electrolytic cell and electric current was passed through it. }

Pieces of blue vitriol were heated in a test tube. On cooling, water was added to it.

Dilute HCl was added to limestone.

Zinc oxide was added to dilute HCl and zinc oxide was added to dilute NaOH.

Magnesium oxide was added to dilute HCl and magnesium oxide was a added to dilute NaOH.

Column ‘A’	Column’B’
(1) Urine(2) Apples(3) Orange(4) Butter	(a) Butyric acid(b) Uric acid(c) Malic acid(d) Citric acid

Column ‘A’ Solution		Column ‘B’ pH
(1)	Milk	(a)	0
(2)	Milk of Magnesia	(b)	14
(3)	1 M HCl	(c)	10.5
(4)	1 M NaOH	(d)	6.5

 Formation of a magnesium chloride from magnesium and chlorine.

Formation of sodium chloride from sodium and chlorine.