Answer:
<em>The pKa is 13.0.</em>
Explanation:
pKa + pKb = 14
Given, Kb of trimethylamine = 6.3 ×
pKb = - log (6.3 × )
= 1.0
⇒ pKa = 14 - pKb = 14 - 1.0
<u>pKa = 13.0</u>
<em><u></u></em>
<em>Check: For most weak acids, pKa ranges from 2 to 13.</em>
The net ionic equation for the neutralization reaction involving equal molar amount amount of HNo3 and KoH is
H^+ + OH^- = H2O (l)
explanation
write the chemical equation
HNO3 (aq) + KOH(aq) = KNO3(aq) +H2O (l)
ionic eequation
H^+(aq) + NO3^- (aq) + K^+9aq) OH^-(aq) = K^+ (aq) + NO3^-(aq) + H2O(l)
cancel the spectator ions( ions which does not take place in equation ) for this case is NO3^- and No3^-
thus the net ionic is
H^+(aq) + OH^- (aq) = H2O(l)
Answer:
Percent error = 1.3%
Explanation:
Given data:
Actual value of boiling point = 100.0 °C
Measured value = 101.3 °C
Percent error = ?
Solution:
Formula:
Percent error = ( Measured value - Actual value / Actual value ) × 100
Now we will put the values in formula.
Percent error = 101.3 °C - 100.0 °C / 100.0 °C × 100
Percent error = 1.3 °C / 100.0 °C × 100
Percent error = 0.013 × 100
Percent error = 1.3%
Thus, percent error is 1.3.