(ii) Zinc granules

We can see some difference between acid, base and salt from some different perspectives. For this reason, liquified (molten) salts and solutions containing dissolved salts (e.g., sodium chloride in water) are called electrolytes. Hence, the milkiness disappears.

CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. When hydrated salts are heated strongly, they lose their water of crystallisation. Strong acids have a pKa of less than -2.
Answer: Strong acids-Hydrochloric acid, sulphuric acid, nitric acid. Question 21. Play game » Related worksheets. These component ions can be inorganic, such as chloride (Cl−), or organic, such as acetate (CH3CO−2); and can be monatomic, such as fluoride (F−) or polyatomic, such as sulfate (SO2−4). (i) In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if following changes are made ? Question 10. CRC Press LLC, Boca Raton: FL 2014-2015, p. 4-89, Lower, S.K., (1999).

Question 17. Most group 1 and 2 metals form strong salts. Read about the examples and uses of Acid, Bases and salts at Vedantu.com. On heating, it forms sodium carbonate (Na2CO3), B and CO2 gas, C is evolved. Here’re some points which can differ the acid, base and salt substances. Answer: (a) In place of zinc granules, same amount of zinc dust is taken in the test tube. Answer: Answer the following questions in short: 1. When it is left open for some time, it absorbs moisture from the atmosphere and forms gypsum, which is a hard solid mass.

Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink? Explain the method of preparation of bleaching powder. Bleaching powder. \(\frac{1}{2}\)H2O). These characteristics may be used to easily distinguish between the two sets up chemicals without performing complicated tests: The strength of acids and bases depends on their ability to dissociate or break into their ions in water. It is called Washing soda. Acids are usually found in many substances including various food items but their presence in many fruits is very prominent, for example:

Answer: While these definitions don't contradict each other, they do vary in how inclusive they are. The lattice energy, the cohesive forces between these ions within a solid, determines the solubility. Water < acetic acid < hydrochloric acid. Weak acids-Cltric acid, acetic acid, formic acid. Solid salts tend to be transparent as illustrated by sodium chloride. Answer:

Answer: Question 22. The two formula unit of Caso share one molecule of water. As a result, it is soft. (i) On heating sodium hydrogencarbonate (NaHCO3), it decomposes to form sodium carbonate (Na2.CO3), water (H2O) and carbon dioxide (CO2). Metal carbonate + acid → Salt + Carbonate dioxide + Water (iii) Bleaching powder is used in water treatment plants for disinfecting drinking water to make it free of germs. They are generally more volatile than strong salts. &base && &&acid && &&salt\: (sodium\: chloride)} Excess addition of which solution would reverse the change ammonium hydroxide solution or hydrochloric acid?

A – NaHOCO3; B — Na2CO3; C — CO2 gas. When knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium bicarbonate solution and produces a lot of CO, gas, which forms a blanket over the fire and cuts it off from the supply of the air to the burning substance and the fire stops. They are generally odorless and nonvolatile. Question 10. (ii) How do metal carbonates and metal hydrogencarbonates react with acids ? Name the gas evolved. Answer: (c) Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated. When a strong base reacts with a weak acid, the acid is unable to fully neutralize the base.

acid reacts with a base to form salt and water. Answer: Zn + 2HCl → ZnCl2 + H2 The hand should be washed immediately with plenty of water and a paste of sodium hydrogen carbonate (a base) must be applied to neutralise the acid. Natural indicator like turmeric can also be used. Ammonium chloride (NH4Cl) is the salt of a strong acid, hydrochloric acid (HCl), and a weak base ammonium hydroxide (NH4OH), so an aqueous solution of ammonium chloride is acidic in nature. (a) It is used for making ceiling designs. The first part comes from the base, alkali or metal carbonate. Name the substance obtained by the action of chlorine on dry slaked lime. What will be the action of the following substances on litmus paper ? 4. The second part comes from the acid: Predict the name of the salt formed when copper oxide reacts with nitric acid. When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil.


Water of crystallisation is a fixed number of water molecules present in one formula unit of a salt. Ammonia is found in many household products, such as window cleaners. (b) It is used for joining the fractured bones. Double-acting baking powders contain both slow- and fast-acting leavening agents and react at low and high temperatures to provide leavening rising throughout the baking process.[11]. Question 22. (b) Instead of dilute sulphuric acid, dilute hydrochloric acid is taken. Answer: For example, sodium acetate, NaCH3COO, smells similar to acetic acid CH3COOH. CaCO3 + 2HCl → CaCl2 + CO2 + H2O

SpeClfy the colour change in each case, if any: Read about our approach to external linking. Salts. Write only the chemical reactions of the following: Salts that produce acidic solutions are acid salts. Since Y and Z are calcium salts, therefore X is also a calcium salt and is calcium carbonate : Answer: What is the formula of magnesium chloride?


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