Step 1: Write the Reaction
The neutralization reaction between NaOH and HCl is:
$$ \text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + H_2O $$
Step 2: Calculate the Moles of NaOH
Given:
Moles of NaOH:
$$ \text{Moles of NaOH} = \frac{\text{Mass}}{\text{Molar Mass}} = \frac{1}{40} = 0.025 \text{ mol} $$
Step 3: Calculate the Moles of HCl
Given:
Moles of HCl:
$$ \text{Moles of HCl} = M \times V = 0.75 \times 0.025 = 0.01875 \text{ mol} $$
Step 4: Determine the Limiting Reagent
The reaction follows a 1:1 molar ratio between NaOH and HCl.
Since HCl has fewer moles, it is the limiting reagent.
Step 5: Calculate Unreacted NaOH
Unreacted moles of NaOH:
$$ \text{Unreacted NaOH} = 0.025 - 0.01875 = 0.00625 \text{ mol} $$
Mass of unreacted NaOH:
$$ \text{Mass} = 0.00625 \times 40 = 0.25 \text{ g} = 250 \text{ mg} $$
Step 6: Conclusion
The mass of unreacted NaOH is 250 mg.
Identify Z in the following reaction sequence.
List-I | List-II | ||
(A) | NH3 | (I) | Trigonal Pyramidal |
(B) | BrF5 | (II) | Square Planar |
(C) | XeF4 | (III) | Octahedral |
(D) | SF6 | (IV) | Square Pyramidal |
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: