Chemistry-
General
Easy

Question

What mole of C a open parentheses O H close parentheses subscript 2 end subscript is dissolved in 250 mL aqueous solution to given a solution of p H 10.65, assuming full dissociation?

  1. 0.47 cross times 10 to the power of negative 4 end exponent  
  2. 0.48 cross times 10 to the power of negative 4 end exponent  
  3. 0.56 cross times 10 to the power of negative 4 end exponent  
  4. 0.58 cross times 10 to the power of negative 4 end exponent  

The correct answer is: 0.56 cross times 10 to the power of negative 4 end exponent


    p O H equals 14 minus p H equals 14 minus 10.65 equals 3.35
    p O H equals negative log invisible function application open square brackets O H to the power of minus end exponent close square brackets
    negative 3.35 equals log invisible function application left square bracket O H to the power of minus end exponent right square bracket
    therefore open square brackets O H to the power of minus end exponent close square brackets equals 4.447 cross times 10 to the power of negative 4 end exponent M
    C a open parentheses O H close parentheses subscript 2 end subscript equals C a to the power of 2 plus end exponent plus blank 2 O H to the power of minus end exponent
    4.447 cross times 10 to the power of negative 4 end exponent M
    fraction numerator open square brackets O H to the power of minus end exponent close square brackets over denominator 2 end fraction equals open square brackets C a open parentheses O H close parentheses subscript 2 end subscript close square brackets equals 2.2235 cross times 10 to the power of negative 4 end exponent M
    Hence, in 250 mL, moles of
    C a open parentheses O H close parentheses subscript 2 end subscript equals fraction numerator 2.2235 cross times 10 to the power of negative 4 end exponent cross times 250 over denominator 1000 end fraction
    equals 0.56 cross times 10 to the power of negative 4 end exponent

    Related Questions to study

    General
    Chemistry-

    How many gram of N a O H must be present in one l i t r e of the solution to give it a p H equals 12 ?

    How many gram of N a O H must be present in one l i t r e of the solution to give it a p H equals 12 ?

    Chemistry-General
    General
    Chemistry-

    Degree of hydrolysis (h) of a salt of weak acid and a strong base is given by

    Degree of hydrolysis (h) of a salt of weak acid and a strong base is given by

    Chemistry-General
    General
    Chemistry-

    Would gaseous H C l be considered as an Arrhenius acid?

    Would gaseous H C l be considered as an Arrhenius acid?

    Chemistry-General
    parallel
    General
    Physics-

    A current passing through a coil of self inductance of 2mH changes at the rate of 20m A s to the power of negative 1 end exponent. The emf induced in the coil is

    A current passing through a coil of self inductance of 2mH changes at the rate of 20m A s to the power of negative 1 end exponent. The emf induced in the coil is

    Physics-General
    General
    Physics-

    In an oscillations of L-C circuit, the maximum charge on the capacitor is Q. The charge on the capacitor, when the energy is stored equally between the electric and magnetic field is

    In an oscillations of L-C circuit, the maximum charge on the capacitor is Q. The charge on the capacitor, when the energy is stored equally between the electric and magnetic field is

    Physics-General
    General
    Physics-

    The magnitude of the earth’s magnetic field at a place is B subscript 0 end subscript and the angle of dip is delta. A horizontal conductor of length l lying magnetic north-south moves eastwards with a velocityv. The emf induced across the conductor is

    The magnitude of the earth’s magnetic field at a place is B subscript 0 end subscript and the angle of dip is delta. A horizontal conductor of length l lying magnetic north-south moves eastwards with a velocityv. The emf induced across the conductor is

    Physics-General
    parallel
    General
    Physics-

    In an induction coil with resistance, the induced emf will be maximum when

    In an induction coil with resistance, the induced emf will be maximum when

    Physics-General
    General
    Physics-

    A magnet N-S is suspended from a spring and when it oscillates, the magnet moves in and out of the coil C. The coil is connected to a galvanometer G. Then, as the magnet oscillates

    A magnet N-S is suspended from a spring and when it oscillates, the magnet moves in and out of the coil C. The coil is connected to a galvanometer G. Then, as the magnet oscillates
    Physics-General

    General
    Physics-

    Energy associated with a moving charge is due to

    Energy associated with a moving charge is due to

    Physics-General
    parallel
    General
    Physics-

    Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction B equals B subscript 0 end subscript e to the power of negative t end exponent is established inside the coil. If the key (K) is closed, the electrical power developed right after closing the switch is equal to

    Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction B equals B subscript 0 end subscript e to the power of negative t end exponent is established inside the coil. If the key (K) is closed, the electrical power developed right after closing the switch is equal to
    Physics-General

    General
    Physics-

    In a circuit with a coil resistance 2 blank o h m s, the magnetic flux changes from 2.0 blank W b to 10.0 blank W b in 0.2 second. The charge that flows in the coil during this time is

    In a circuit with a coil resistance 2 blank o h m s, the magnetic flux changes from 2.0 blank W b to 10.0 blank W b in 0.2 second. The charge that flows in the coil during this time is

    Physics-General
    General
    Physics-

    The current through choke coil increases from zero to 6 A in 0.3 blank s e c o n d s and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is

    The current through choke coil increases from zero to 6 A in 0.3 blank s e c o n d s and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is

    Physics-General
    parallel
    General
    Physics-

    A 50 H z ac current of peak value 2 A flows through one of the pair of coils. If the mutual inductance between the pair of coils is 150 m H, then the peak value of voltage induced in the second coil is

    A 50 H z ac current of peak value 2 A flows through one of the pair of coils. If the mutual inductance between the pair of coils is 150 m H, then the peak value of voltage induced in the second coil is

    Physics-General
    General
    Chemistry-

    For the reaction, H subscript 2 end subscript plus I subscript 2 end subscript rightwards harpoon over leftwards harpoon 2 H I comma the equilibrium concetratio of H subscript 2 end subscript comma blank I subscript 2 end subscript and HI are 8.0, 3.0 and 28.0 mol/L respectively. The equilibrium constant of the reaction is

    For the reaction, H subscript 2 end subscript plus I subscript 2 end subscript rightwards harpoon over leftwards harpoon 2 H I comma the equilibrium concetratio of H subscript 2 end subscript comma blank I subscript 2 end subscript and HI are 8.0, 3.0 and 28.0 mol/L respectively. The equilibrium constant of the reaction is

    Chemistry-General
    General
    Chemistry-

    In the reaction, N subscript 2 end subscript O subscript 4 end subscript rightwards harpoon over leftwards harpoon 2 N O subscript 2 end subscript comma blank alpha is that part of N subscript 2 end subscript O subscript 4 end subscript which dissociates, then the number of moles at equilibrium will be

    In the reaction, N subscript 2 end subscript O subscript 4 end subscript rightwards harpoon over leftwards harpoon 2 N O subscript 2 end subscript comma blank alpha is that part of N subscript 2 end subscript O subscript 4 end subscript which dissociates, then the number of moles at equilibrium will be

    Chemistry-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.