For a substance to melt it has to be a solid
<span>The ionisation eq for MNCO3 is given by
MnCO3 --> Mn^2+ + CO3^2-
Recall Ksp=[Mn^2+][CO3^2-]
From the chemical reaction one moles of manganese and carbon reacts
Here molar solubility of MnCO3 is 4.2 * 10^-6 M;
Which means that when 4.2 * 10^-6 moles of [Mn^2+] reacts, it also reacts with 4.2 x 10^-6 M of CO3
Thus Ksp= 4.2 x 10^(-6) x 4.2 x 10^(-6) = 17.64 * 10^(-6+(-6)) = 17.64 * 10^(-12)</span>
A. 599 mg x 1g/1000mg x 1mole/174.24g = 0.003438 moles
<span>b. 0.003438 moles x 1000 mmoles/mole = 3.438 moles </span>
<span>c. 0.003438 moles/0.741 L = 0.0046 M </span>
<span>d. [K+] = 2 x 0.0046 = 0.0092 M because each mole K2 SO4 yields 2 moles K+ </span>
<span>e. [SO42-] = 0.0046 M </span>
<span>f. 599 mg/0.741 L = 808.4 mg/L = 808 ppm </span>
<span>g. 0.599g/741 ml x 100 ml = 0.08 g/100 ml = 0.08% w/v </span>
<span>h. pK+ = -log [K+] = -log 0.0092 = 2.04 </span>
<span>i. pSO42- = -log [SO42-] = -log 0.0046 = 2.34</span>
I believe the correct answer would be letter C: removing an inhibitor. First of all, a catalyst increases the rate of reactions. Also, increasing temperature causes more reaction because molecules are more active this way. Lastly, lowering the concentration of the reactants will not increase the rate of reactions because again, high concentration causes collision..