> 実験のやり方を変えてみたんです。今度はきっと成功する **はずです** 。期待していてください。

vs

> 実験のやり方を変えてみたんです。だから、こんなにいい結果が出た **わけです** 。

Can someone explain what the difference between these two sentences above is?
Mainly the difference between はず and わけ.

They both mean the same thing to me, the experiment was changed so the output
should be a success.

What gives?
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question
meaning word-usage
What's the difference between わけです。 and はずです。?
`今度はきっと成功するはずです` means `It should be successful this time`.

今度 means [this time](https://jisho.org/search/%E4%BB%8A%E5%BA%A6), きっと is an
adverb indicating
[certainty](https://jisho.org/search/%E3%81%8D%E3%81%A3%E3%81%A8), 成功する is a
suru verb that means [to succeed](https://jisho.org/search/%E6%88%90%E5%8A%9F)
and [はず](https://jisho.org/search/%E3%81%AF%E3%81%9A), a noun, which can
appear at the end of a sentence followed by だ or です to mean 'to be supposed to
(do)'. It is used when the speaker draws a conclusion from preexisting
understandings.

`だから、こんなにいい結果が出たわけです` means `In this way, I got a good outcome`.

だから is a conjunction indicating
[consequence](https://jisho.org/search/%E3%81%A0%E3%81%8B%E3%82%89), こんなに is
an adverb meaning [in this
way](https://jisho.org/search/%E3%81%93%E3%82%93%E3%81%AA%E3%81%AB), いい is an
adjective meaning [good](https://jisho.org/search/%E3%81%84%E3%81%84), 結果 is a
noun meaning [result](https://jisho.org/search/%E7%B5%90%E6%9E%9C), 出た is the
past form of 出る that, in this case, means [to
get](https://jisho.org/search/%E5%87%BA%E3%82%8B). Finally, わけ is a noun that
means [reason](https://jisho.org/search/%E3%82%8F%E3%81%91). This noun can be
followed by だ or です at the end of a sentence to mean 'that's why' and it can
follow:

  * Adjectives and verbs in the dictionary or ta-form.
  * Adjectival nouns or nouns + na/no or datta

In this case it follows 出た.

* * *

As for `実験のやり方を変えてみたんです`, which means `I changed the way I experimented`, you
may consult:

  * [Saying "try" in Japanese](https://japanese.stackexchange.com/questions/29928/saying-try-in-japanese) ~てみる
  * [What is the meaning of ~んです/~のだ/etc?](https://japanese.stackexchange.com/questions/5398/what-is-the-meaning-of-%EF%BD%9E%E3%82%93%E3%81%A7%E3%81%99-%EF%BD%9E%E3%81%AE%E3%81%A0-etc)
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answer