---
title: Baking soda is a mild alkali, the opposite of an acid. — Alkalis and soda, and how they cancel acids · tree and pragmatics
description: Baking soda is a mild alkali, the opposite of an acid. Who acts: Baking soda. A sentence of the lesson «Alkalis and soda, and how they cancel acids» of the chemistry course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Alkalis and soda, and how they cancel acids, sentence 1

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Baking soda is a mild alkali, the opposite of an acid.

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**Who acts:** Baking soda · **What happens:** be · **To what, where:** mild alkali

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This is a sentence of the lesson «Alkalis and soda, and how they cancel acids» of the chemistry course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (Baking soda), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:016-alkalis-and-soda.lesson:1
# text = Baking soda is a mild alkali, the opposite of an acid.
# source = school lesson (ours)
# course = chemistry
# lesson = 016-alkalis-and-soda.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1
1	Baking	baking	NOUN	NN	Number=Sing	2	compound	_	_
2	soda	soda	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	mild	mild	ADJ	JJ	Degree=Pos	6	amod	_	_
6	alkali	alkali	NOUN	NN	Number=Sing	0	root	_	_
7	,	,	PUNCT	,	_	9	punct	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	opposite	opposite	NOUN	NN	Number=Sing	6	appos	_	Agree=R7-rel-agree|Haiku=6:conj
10	of	of	ADP	IN	_	12	case	_	_
11	an	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
12	acid	acid	NOUN	NN	Number=Sing	9	nmod	_	_
13	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | Baking soda | a mild alkali |  |  |  |  | tree rules |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:chemistry:016-alkalis-and-soda.lesson:1`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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