Answer:
The pH value of the mixture will be 7.00
Explanation:
Mono and disodium hydrogen phosphate mixture act as a buffer to maintain pH value around 7. Henderson–Hasselbalch equation is used to determine the pH value of a buffer mixture, which is mathematically expressed as,
![pH=pK_{a} + log(\frac{[Base]}{[Acid]})](https://tex.z-dn.net/?f=pH%3DpK_%7Ba%7D%20%2B%20log%28%5Cfrac%7B%5BBase%5D%7D%7B%5BAcid%5D%7D%29)
According to the given conditions, the equation will become as follow
![pH=pK_{a} + log(\frac{[Na_{2}HPO_{4} ]}{[NaH_{2}PO_{4}]})](https://tex.z-dn.net/?f=pH%3DpK_%7Ba%7D%20%2B%20log%28%5Cfrac%7B%5BNa_%7B2%7DHPO_%7B4%7D%20%5D%7D%7B%5BNaH_%7B2%7DPO_%7B4%7D%5D%7D%29)
The base and acid are assigned by observing the pKa values of both the compounds; smaller value means more acidic. NaH₂PO₄ has a pKa value of 6.86, while Na₂HPO₄ has a pKa value of 12.32 (not given, but it's a constant). Another more easy way is to the count the acidic hydrogen in the molecular formula; the compound with more acidic hydrogens will be assigned acidic and vice versa.
Placing all the given data we obtain,
The effective nuclear charge is the net positive charge experienced by valence electrons
<em>Weather.</em>
<em>You see how the weather is in a certain place can determine how the plant life and just life in general would live. It can also effect people. Let's say there was a drought somewhere, this would effect people whereas, they could lose a significant source of water and food because it would make them likely have to find a new water source or the animals would. Weather also effects the land in harmful ways. For example when it floods, the ground gets muddy but can also get so muddy below a certain area, that the soil entirely collapses into the ground (that would be a sinkhole).</em>
<em>There are picture below to show you some of the effects.</em>
<em>-R3TR0 Z3R0</em>
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