B. saponification
C. ionization
D. neutralization
Answer: D. neutralization
Explanation:
1. Substitution reaction is defined as the reaction in which one atom replaces the other atom from the compound.
2. Saponification is a reaction in which fatty acids are made to react with alkalis to form sodium salt of fatty acids called as soaps.
3. Ionization is a type of chemical reaction in which a substance ionizes when dissolved in water.
4. Neutralization is a type of chemical reaction in which an acid reacts with base to produce salt and water.
2.5 x 10-2 L
25 m3
According to the molar concentration, volume in liters of 2 M KCl solution is 16.76 L.
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Volume required is obtained by molarity formula as, 2×74.55/2500=1/V=0.05964
∴V=1/0.05964=16.67 L.
Thus, 16.67 L of 2 M KCl solution contains 2.5 kg of KCl.
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and a temperature of
(1) 0°C (3) 273°C
(2) 100°C (4) 373°C
QmΔT
Q/mΔT
Qm/ΔT
m/QΔT
Answer:
J/(gK)
Explanation:
The equation for the energy, Q released or gained by a system of mass (m), specific heat capacity (s), and temperature change (ΔT) is given by:
Q = msΔT
Rearrange this to isolate c, the specific heat:
msΔT = Q
s = Q/(mΔT)
Q is energy and is commonly expressed in Joules (J). We'll use this unit, but others such as calorie, kJ, BTU, etc., are possible.
m is the mass and is commonly expressed as grams (g). Other units such as kg and even lbs are possible (but who uses English units in science?) Let's select g.
ΔT is commonly expressed in Centigrade (C) or Kelvin (K). OK, Fahrenheit(F) is also possible, but really? We'll use K here.
Now put these units into the expression for s:
s = Q/(mΔT)
s = J/(gK)
The specific heat capacity of a substance, represented by the symbol 's', can be calculated using the equation s = Q/mΔT, where 'Q' is the heat energy, 'm' is the mass of the substance, and 'ΔT' is the change in temperature.
The specific heat capacity (s) is a property of a substance that determines how much heat energy (Q) it requires to change its temperature (ΔT). Mathematically, Q = msΔT. Therefore to find the expression for s, you should rearrange this equation to solve for s. This gives: s = Q/mΔT.
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