Answer:
Which of the following pairs lists a substance that can neutralize Ca(OH)2 and the salt that would be produced from the reaction?
HCl and CaCl2
HClO and CaHClO
H2O and Ca(OH)3
H3PO4 and Ca(PO3)2
Explanation:
The given substance is Ca(OH)2 which is a base.
To neutralise a base an acid is required.
Among the given options,
HCl and H3PO4 are the acids.
The salts foremd when calcium hydroxide reacts with the respective acids are CaCl2 and Ca3(PO4)2.
But among the given options, only the forst option that is
HCl and CaCl2 shows the correct formulas.
Hence, the answer is first option.
Answer: The concentration of hydrogen ions for this solution is .
Explanation:
Given: pOH = 11.30
The relation between pH and pOH is as follows.
pH + pOH = 14
pH + 11.30 = 14
pH = 14 - 11.30
= 2.7
Also, pH is the negative logarithm of concentration of hydrogen ions.
Substitute the values into above formula as follows.
Thus, we can conclude that the concentration of hydrogen ions for this solution is .
Rock cycle - a process in which a rock forms, changes from one type of rock to another, forms again by processes on and in the Earth.
Metamorphic Rock - Rocks changed by intense heat or extreme pressure.
Sedimentary Rock - A rock that forms when sediments are compacted and cemented together.
Igneous Rock - A rock that forms when molten rock cools and hardens.
As the frequency is how many waves pass a fixed point in certain amount of times. This means that the waves get closer together and, therefore, the wavelength decreases. It also means that the wave has more energy.
Answer: D) Energy increases, wavelength decreases
Answer:
Mg(OH)₂(s) + 2HCl(aq) ----> MgCl₂(aq) + 2H₂O(l)
Explanation:
Magnesium hydroxide is a white solid that is sparingly soluble in water. It is a basic hydroxide, therefore it neutralizes acids to form salt and water.
Magnesium hydroxide commonly used as an antacid, for example milk of magnesia, because it reduces stomach acid, and increases water in the intestines which may induce bowel movements. It also relieves indigestion, sour stomach, and heartburn. Magnesium hydroxide is also used as a laxative to relieve occasional constipation.
The equation for the reaction between magnesium hydroxide and stomach acid, HCl, is as follows:
Mg(OH)₂(s) + 2HCl(aq) ----> MgCl₂(aq) + 2H₂O(l)